The parachute thing is really minor, but I hate that extra shopkeeper. It sucks that whenever you didn't foresee that the boulder would bounce back and hit the wall of a shop, your game is screwed.
It certainly does suck, but it's not really a bug. At least the part about spawning by the exit. Some of the things they blame you are arguably buggy.
It IS entirely possible to win a game even with those guys after you, but needless to say it does make things quite a bit more difficult. Also, As long none of them actually die, they'll give up chasing you after about two levels.
Ahh... the shopkeeper getting angry for incidents out of our control is a problem on the HD version...
In the Classic, it occurs rarely, very rarely, since there is frozen region, no mines or tiki men, boulder travel less and frozen region makes it less likely to get into a shop.
About the boulder, it happens early in the game, so you shouldn't worry much, if your run is wasted. The latter areas' idol traps aren't much of a problem for shopkeepers...