Here's what I can offer:

#1 - I try to remember to set the hook at least in an upward motion. Sure back is better but sometimes the angle isn't there. "Up" has worked very well for me through the years.

#2 - The fish may have "swung and missed" and bumped the lure with it's body. It came back around and nailed it.

#3 - Personally I never cast into the wind unless I have to...but that's me.