You may want to delete the game file and reinstall the game, you have your save file so you should be fine. Delete the game itself, and reinstall the game again to see if that rectifies any other lingering issues. What do you mean blocked game? Well to be safe uninstall the game, do a database rebuild(starting the console is safe mode by holding the power button for 3-6 seconds(not sure) or until you hear a double beep release it once you hear that, you'll need your usb cable to use the controller at this time) the rebuild option should be near the bottom of the list of options. Once that's done, reinstall GT Sport and check to see if you still haven any lingering issues.
Well according to what's listed in the auto upload section, the PS+ backup happens when you enter rest mode or start up the machine when it's connected to the internet. So if you haven't shut your machine down for hours on end or entered rest mode, it won't upload unless you do it manually. If you don't use your system for that day it will upload around 12 am at night or at least once for the day of all your auto upload files. When I wrote my response yesterday for ambiorix88 I saw that both my upload and HDD save file carried identical last save times of 11 am that morning, which prompted me to check when it does upload, previously I only noticed it uploading around midnight. So it backs up each time you enter sleep mode and if you don't use that mode, the next time you power the system on it will back up. Just remember to keep your PS4 always connected to online to preserve your back ups to the most current. I haven't tried offline backup, nor have I even tried to see if that can be done automatically like it does with PS+.