This one was wrong because there were no major incidents and fairly regulation stoppages. There was just 2 minutes added in the Arsenal - Stoke game which had 3 subs and a goal as well as more fouls and other stoppages too. The only times you see 5+ minutes added are usually when there's been a big injury, 4/5 goals or another major incident that stopped the game for a period.
I wasn't paying complete attention but enough to make me question where the 5 minutes came from and as yet I've seen nobody come up with anything to justify it. I thought I must have missed a big injury or something because 5 minutes was way ott.
Its just as valid to have a few minor incidences (its not like a sub is anything "major" , but still has to be allowed for) than one major one