If you have orphaned batch records then the batch numbers they represent are skipped.

Look for the following files in your data directory;
ARC####?.DAT (Cash batch)
ARI####?.DAT (AR Invoice batch)
QIB####?.DAT (Invoices invoice batch)

For example ARC0103H.DAT and ARC0103D.DAT would be cash batch 103. If you have files that have older dates then you have found he cause.

Verify that the batch status report does not show these as being open and you can safelt delete them. Make sure you have a backup first.