My issue is specifically with Cloud restore points. The screen you posted is for Disk, but those options don't exist for Cloud.
Here's a screen grab of "FILES" for the Cloud repository for one of the jobs in question. Note there are 20 files, and no files between 2/15 - 3/17.
After rescan of repository, it shows 44 restore points, 24 more than exist.
When I do right-click, Properties on the Cloud backup, all these incrementals show. They don't come up italicized or grayed, and there's no way to remove them anymore.