1. Yes, they can.
2. Incomplete conversion would lend me to think that A.) your PH is really jacked, B.) You decocted too thin of a mash and left too few enzymes in the main mash, C.) Your thermometer is reading way high, or D.) (unlikely) you got some really poorly modified malt. The cloudiness I wouldn't worry about - you get a lot of proteins with a decoction. It will likely clear out in no time.
I love the sound of an airlock bubbling in the morning. It sounds like.....VICTORY.
Originally Posted by TxBrew
It's now degenerating into nu uh and uh huhs and it no longer serves a point.