We have a mystery

whereby blank records keep showing up in WC-C and I am wondering if this is somehow happening when the user adds or deletes bin locations? I have to go in and remove the blanks and they'll be gone for a while and then start coming back.
I traced one issue last year that had created over 2600 blank records to an instance where a specific bin location was created in WC-C for a part. Once the bin was deleted and the blanks removed, the issue was gone. Just recently we are seeing blanks again and I'm trying to determine what may be happening. There is only one user who controls the WC stuff. There must be something happening with the add and delete actions that causes this to happen.
Ideas?
Val