Upgrade wierdness

I upgraded all my windows machines to 17. The upgrade went fine. They all share the same MYSQL database (same advancedsettings.xml). For some reason they all, independently, keep track of their own progress through videos. That is, I can watch something on one machine and it’s checked “watched” but when I go to any of the other machines the check isn’t there. Nor can I start watching something in one room and continue in another like I had since 14. Anyone have any ideas why this is occurring?