About LeaverBuster

I have a really hard time with these plays

• My computer broke down and I logged back to the game while in-game was 5 minutes.When the Match was over it said that I left the match and still get LeaverBuster.
• When I play 5 games on LeaverBuster 10 minutes then its over.But when 2 months later I leave a game its not 5 minutes.Its 15 minutes because I left games 2 months before. It have a chain reaction which can't be re-started so please fix that.