Cloud sync doesn't work properly

First problem: I had only two scores uploaded when I was using the previous version and I saved the same scores once again after updating to MuseScore 4, so I wanted to delete them and start anew. But when I deleted them from musescore.com Score Manager and launched MuseScore 4, they were still in the Scores tab, able to be opened (maybe they were saved to cache?).

Second problem: My scores are saved to cloud only when I click Save to Cloud from the File menu. If I close the file without saving that way, MuseScore 4 asks me if I want to save or quit without saving. If I press Save, then Save to cloud, the Scores tab shows the score as if it would be saved to cloud, but there is no score in musescore.com Score Manager.