early on, i believe you posted in the cutoff and it was folded to you. this is an autoraise with any 2 cards.
as everyone else said, check/fold that 66 hand.
on another, you 3bet jqo vs. SB's open raise. i like it. however, you should have raised for a free card when he donked the 9-high flop.
ajo hand: i fold this one preflop. your hand plays poorly multiway and you have the worst possible position (absolute and relative). this guy isn't raising light enough after 2 limpers to make this a good 3bet.