Match History Bug ? Please Help ..

So, over night there were what appeared to be 6 games played on my account to which i freaked out, assumed someone had my details, changed my password and got over it. But what I noticed was, when i click on the match history it's saying that my IGN is BenGGi with two G's and that the people i'm vsing IGNs aren't found in the OCE server.

I then logged on the next day, and there was 6 more games from BenGGi vsing other people that aren't actually on OCE. I turned to OP.GG and search the NA IGN BenGGi and all their games are showing up in my match history ??

Nothings changed stat wise, my LP hasn't changed nor my win/loss but the matches are showing up in my history.

Please explain.