Title says it all. I thought I was crazy the first time it happened or that I'd accidentally deleted my latest Configuration version, but now it's happening again. Then some days later when I logged in the version I thought had disappeared was back.
This morning I was able to see all of the several versions of this Configuration I made, and for some reason right now I can only see a few of them.
EDIT: What I've learned is that some of the configuration versions only show up in the Danfoss default group. Why would only versions 4, 5, and 7 show up in the customer's subgroup but all versions up through 8 show up in the default group? I could be mistaken, but I think they were all made in the subgroup.