Auto numbering checks in 2008 Accountants Copy?

I have had 2 clients give me accountants copies from their 2008 QB and then I've exported my changes for them to merge into their working file. Both have checks with no check number listed (for debits, atm withdrawals, etc.). Both files automatically assigned check numbers to these numberless checks!!! This is a huge problem and each debit now needs to be edited to remove the check number or replace the number with the text "debit". I guess I can eliminate the problem in the future by always typing debit in the number field, but I like to leave it blank (it's more efficient) and so do my clients.Anybody else out there having this problem? If so, do you know how to fix it?