Save issues

Hi all, today I am sad. I had a deal where my little brother would buy nfs most wanted, I would buy rivals. We bought most wanted today on origin and downloaded it, and he played it. Now his progress happens on my windows account too!  It's seems like an origin thing, and I am wondering if there is a way to have an offline account, or separate saves. Because I'm not going to play on his save, and beat his game, but I wanted this game really bad. ☹️ If this isn't do-able, I'll understand, but I'll greatly appreciate an answer.

EDIT: I forced off line by disconnecting from my home network, annoying but it works.