"run in the house" can mean "run around inside the house" or "run into the house," so "in villam currunt" is not a typo and should be accepted along with "in villa currunt." Already reported
Also: Mustelae muresque in villa currunt.
oh cool, so muresque means with mice or and mice?
-que is just another way of saying "and."
It attaches at the end of the 'second member' of the group:
pueri et puellae, OR pueri puellaeque.
(It can 'attach' other parts of speech as well, not just nouns.)