NO, No, No ....... please don't get freaked out.

95% of spirits / ghosts are LONELY ........ and that is why they roam and seek out company.
You must have a very vibrant house - by that I mean, full of love , friendly, open, etc ......... to have had 3 spirits!

Mind you, your nextdoor neighbour - He ruined it for the other 2 "friendly" spirits!