The butterflies in the house sounds like you have a spawner in the area.
I found this answer online. Hope it helps.
1. Go into Buy mode.
2. Open the cheat box with CTRL+SHIFT+C.
3. Type in "testingcheatsenabled true" (without quotes)
4. Open the cheat box again.
5. Type in "buydebug" (still without quotes).
6. Search your house for the bug spawners (they look like gray boxes with pictures of butterflies on them.)
7. Sell the spawners.
8. Get rid of any butterflies left in your house.