Hi there!
The achievement needs to be done in a single boss; it resets after each fight if not met.
I'll take a look at those two bugs tonight and push out an update. Sorry about that! Thanks for bringing them to my attention.
If you can share any more details about the Sandbar freeze that would help me pin down what causes it. Things like, last plot point, action taken, etc.
Bugs have been fixed; update pushed through :)
Cheers





