I was shown 3 different accounts before it finally decided to show me my own...
Logged into someone else's account?

Me too I log into someone else account what does it mean?
You can't log into someone else's account. You have a unique username and password.
I went on chess and my Home Screen on the app was someone else’s account
same here man.

Same thing happens to me, my hope page shows that I am logged into somebody else's account, my language and background are all different, but when I click anything else on the side bar I return to my normal profile.

Same thing happens to me, my hope page shows that I am logged into somebody else's account, my language and background are all different, but when I click anything else on the side bar I return to my normal profile.
Exact same

I tried changing my password, thinking somebody stole my account or something, but I still return to a home page of a foreign account.

#I have the same thing. I am not actually logged into someone elses account, but I have a different players name a the top of the screen and the layout is all different.
I got onto chess.com and I was logged into someone else's account, but the weird thing is, we are both from the same state.