Is it possible that someone is playing my Sudoku game and adding to my scores?

Thanks, in that case from your side it seems that your account is not compromised.
Try reinstalling the game in all your devices, then sign in with your account and if you play on multiple devices don't do it for a couple days. Try just with your phone (or your main device) and test how it goes

If the issue persists the next step will be reach Microsoft casual games here:
https://microsoftcasualgames.zendesk.com/hc/en-...

Thanks for this, I did check the activities and there is no abnormal sign ins. At this point I wish there were so I'd have some kind of explanation.

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this El

That's really strange, usually when you change the password the next time that you or someone else wants to use you account the password is going to be asked.

If you check your sign inactivity here:
https://account.microsoft.com/security

Are you able to see an unknown location or not at all?
Also, in case you didn't do it. Please enable two steps verification in your account and see if that does the trick after couple days

Here is my screenshot of the Sudoku AD popping into the game playing field instead of staying in the square blue box for it. i1274.photobucket.com/.../Sudoku%20Ad%20Interference_zps4h8gsecv.jpg.

This problem has plagued my game playing in both jigsaw and Sudoku for over a month now. It seems that certain ads (yesterday it was the add for the NBA) cause my game play to freeze up. The timer (if I am playing the timed jigsaw)
continues to run (you can see the seconds ticking off) but you can do nothing in either game. Sudoku just sits there. If you happen to still be there when the ad changes, you may be lucky enough to make an entry in the puzzle. In the Jigsaw daily challenge,
the same problem exists. You could be in the process of moving a puzzle piece when the ad changes and your movement just stops and nothing moves again until the ad changes.

It is a most annoying problem and one that will very soon cause me to stop playing the various challenges as it is too frustrating. Recently I played the three Sudoku puzzles and it took over six hours to be able to complete them. Not because I couldn't
figure them out but because they continually froze up. Restarting the pc seems to do nothing to resolve the issue.

Hopefully someone from Microsoft reads these entries and can find someone to look into the problem.