Somehow given loss after winning game...cheating?

I was playing in Hut Champions Qualifier last night.

Game was very laggy but playable 

1St match  

I was winning the match 5-2 , at the 85' minutes i was awarded a penalty and the opponent left. I was then sent to the main menu and was given a loss and a ''Do not finish** penalty.

On my second match i was winning 1-0 , opponent left and the same thing happened : sent tot he main menu and was given another loss.

Instead of being 3-3 , i am now 1-5.

I have never occured this problem back to back...