I don't know about the original recommendations wierdness. I remember getting those questions repeatably on one of my devices. They did go away, but I don't remember what I did to fix it.
The rest sounds like a problem with the database. The tiles being strange after a restart is a common symptom. They fix themselves as you use the device but, the database won't be updated properly.
You can check the database using a SQLite database management tool, or calibre plus my Kobo Utilities. If it is corrupt, you will need to sign out on the device and then back in. This will regenerate the database and redownload the books.
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