R12.2.7 : missing triggers after upgrade

Hello,

We are in process of upgrading from 11i to R12.2.7  .     We have done 3 test round of upgrades.      However , there is some difference in objects between 2 rounds of upgrade and we are trying to understand the reasons.    For example,   Some triggers are missing after 3rd round of upgrade compared to 2nd round of upgrade.   This is one example

TEST2 env

SQL>

  1  select trigger_name ,table_name from dba_triggers

  2  where table_name like 'OE_ORDER_LINES%'

  3* and owner='APPS'

TRIGGER_NAME                        TABLE_NAME

----------------------------------- -----------------------------------

JAI_OE_OLA_ARIUD_T1                 OE_ORDER_LINES_ALL#

JAI_OE_OLA_ARIUD_TRG                OE_ORDER_LINES_ALL#