EBS R12.1.3 concurrent request id increasing by 1000.

Hi,
We are having this issue in a test env.     All the concurrent request id are increasing by 1000 .  It was fine until yesterday.   The sequence looks okay.

SEQUENCE_OWNER                 SEQUENCE_NAME                   MIN_VALUE
------------------------------ ------------------------------ ----------
 MAX_VALUE INCREMENT_BY C O CACHE_SIZE LAST_NUMBER
---------- ------------ - - ---------- -----------
APPLSYS                        FND_CONCURRENT_REQUESTS_S               1
2000000000            1 N Y       1000     7199905

select request_id, last_update_date from fnd_concurrent_requests
order by 1;

7027446 18-SEP-13

   7027447 18-SEP-13

   7027448 18-SEP-13

   7027449 18-SEP-13

   7027450 18-SEP-13

   7027451 18-SEP-13

   7027452 18-SEP-13

   7027453 18-SEP-13

   7027454 18-SEP-13

   7027455 18-SEP-13

   7027905 18-SEP-13

   7028905 18-SEP-13

   7029905 18-SEP-13

   7030905 18-SEP-13

   7031905 18-SEP-13

   7032905 18-SEP-13

Please advise.

Thanks