I'm sure the first bug you pointed out is more of an easter egg than a bug. There are also other events in the game that cause your game to crash.
As for the third bug, everything is fine. You don't need to retrieve garbage bags. Just pick up a roll of garbage bags and click on the pile of garbage. The roll of bags is a more practical alternative to the regular bags, although the roll does cost a bit more. It's easier to keep a roll of bags in your inventory and you can also see how many bags are left if you left-click on an empty spot.