Orders going off Credit Hold

Our orders can go on multiple holds: PP, CC, CL, C2, etc.  On occasion, one of these hold codes is eliminated.  The order starts out that way, but ends up with another or no hold code.  It usually happens to only one of our customer service reps.  When I create orders in our test environment for these customers, it works fine for me.  We are on A73 Cume11.  Can anyone give me any insight on why this is happening?  Our only alternative is to sit and watch everything this customer service rep does ALL DAY long when she's entering orders.