Incorrect items (Sync) between Collectorz and CLZ

Hi. I use the desktop version of Collectorz and a grandfathered version of CLZ. I have Collectorz set to auto-update. I do see the immediate updates in CLZ. My issue is the following: there are items showing in CLZ that I do not have anymore. These items are fully filled out and appear proper but I do not show them in Collectorz. I do not know how to sync the two db’s. This issue is on the web version of CLZ, not mobile. Any ideas are welcome.

Before I dive into this, I am confused about:

So what exactly are you referring to with “CLZ” ?