different explain plan

Hi,on 11.2.0.3 on Win 2008,
the same query has different EXplain Plan  :

DBREC :
----------------------------------------------------------------------------------------------                                                                                                                                                                                                              
| Id  | Operation                          | Name               | Rows  | Bytes | Cost (%CPU)|                                                                                                                                                                                                              
----------------------------------------------------------------------------------------------                                                                                                                                                                                                              
|   0 | INSERT STATEMENT                   |                    |     1 |    31 |  9334   (1)|                                                                                                                                                                                                              
|   1 |  LOAD TABLE CONVENTIONAL           | PS_AP_BI_ACOMPTE_I |       |       |            |                                                                                                                                                                                                              
|   2 |   VIEW                             | VM_NWVW_2          |     1 |    31 |  9334   (1)|                                                                                                                                                                                                              
|   3 |    SORT UNIQUE                     |                    |     1 |   157 |  9334   (1)|                                                                                                                                                                                                              
|*  4 |     FILTER                         |                    |       |       |            |                                                                                                                                                                                                              
|   5 |      NESTED LOOPS                  |                    |     1 |   157 |  9325   (1)|                                                                                                                                                                                                              
|   6 |       NESTED LOOPS                 |                    |     1 |   102 |  9323   (1)|                                                                                                                                                                                                              
|*  7 |        HASH JOIN                   |                    |     1 |    66 |  9319   (1)|                                                                                                                                                                                                              
|*  8 |         TABLE ACCESS FULL          | PS_PYMNT_VCHR_XREF |  3019 | 33209 |  4651   (1)|                                                                                                                                                                                                              
|   9 |         MERGE JOIN CARTESIAN       |                    |   160K|  8613K|  4667   (1)|                                                                                                                                                                                                              
|* 10 |          INDEX RANGE SCAN          | PS_AP_FACT_I       |     1 |    21 |     3   (0)|                                                                                                                                                                                                              
|  11 |          BUFFER SORT               |                    |   320K|    10M|  4664   (1)|                                                                                                                                                                                                              
|  12 |           TABLE ACCESS FULL        | PS_PYMNT_VCHR_XREF |   320K|    10M|  4664   (1)|                                                                                                                                                                                                              
|  13 |        SORT UNIQUE                 |                    |     1 |    36 |     4   (0)|                                                                                                                                                                                                              
|  14 |         TABLE ACCESS BY INDEX ROWID| PS_PYMNT_VCHR_XREF |     1 |    36 |     4   (0)|                                                                                                                                                                                                              
|* 15 |          INDEX SKIP SCAN           | PSFPYMNT_VCHR_XREF |     1 |       |     3   (0)|                                                                                                                                                                                                              
|  16 |       TABLE ACCESS BY INDEX ROWID  | PS_PAYMENT_TBL     |     1 |    55 |     2   (0)|