I have two suspicions as to the source:
The questions that appear in the Acct Pre-Exam 1 category are the ONLY questions that were in our system when we had ver 1.9. So they went through the conversion to 2.0 (before I came on board as Admin). No matter how many times I clean up the categories, those earlier questions reappear periodically. I suspect they are hidden inside some table in the system.
In addition, we had some questions that needed to be tweaked just a little. I renamed them using "aaa" at the beginning, so I was sure they were the NEW version of the question, not the old. Then I moved the OLD version of the question into a category I'd created called "Archive - just in case." Somehow, they manage to creep outside that category periodically. So that almost sounds like a damaged question table.
Since we are hosted, I don't believe I have the ability to look at that underlying table. If I could look at it, I might be able to see what's happening.
In the image attached to this reply, you will see how we rename questions using an upload date and my very old method was to place the aaa in front. Don't do that anymore. The questions in the image are from the "Archive - just in case category" which I NEVER, EVER use. I suspect that if I delete that category completely, it will sooner or later reappear in my question bank. I will do that and report back if/when it happens.
As always, I so appreciate your quick response to my inquiries. For our company, the question databank is the heart and soul of what we do.
With appreciation, Kathleen