Is this a leak in my MTT: Calling QQ to allin reraises

[Crispy]

Playing in the Empire 15k gauranteed I was playing pretty well. Got down to bottom 25. Final 3 tables. Im sitting at 15k which is about 5th in chips. I get dealt QQ in UTG +1. 1 fold and I make it 3 1/2 X BB for 1750. BLinds are 250/500. Now a short stack goes all in for 7k. One thing I know about this guys is that he likes to move all in with his monsters and call with AQ Aj etc. Can you guys make this fold? This happened to me twice in the tourny and I want to know if it is a leak. I am having a hard time folding when someone reraises me all in even if I have the read of him being a tight player.

After losing this im down to about 8k. At this point I am probably 2k less than average. I get KQ in MP+1, folded around to me I make it 1750 again. Another shortstack goes all in on button against me for his 8k. and I fold. Were both of my decisions wrong. Should I have called both? Folded both? Insight needed.