I am not 100% sure how the LP system works, but it is starting to piss me off. I recently played a game with Ezreal which lasted around 55 minutes I believe. We ended up winning and I only got 6 LP. Then I play another game with Ezreal and lose after a 20 minute surrender. (We had a DC) I ended up losing 14 LP.

This isn't the first time it has happened either. It is a common trend I will win a game and get around 6-9 LP max but then end up losing 10-15 after a loss. I am not really complaining, just sorta frustrated...