Two Pair - Go back and take a look at the board texture and see what it looks like. Where are you stacking off?

Shove - This confuses me, too. I've seen some weird stuff where they said it was +EV.

Flopping non-nut flush - You want to give incorrect odds to call for chasing a 4-flush, but getting it AI here is ALWAYS a good choice. Letting them draw it out just gives a chance for a 4 flush.