Can two Creepers be attached to the same Keeper?
From a discussion on BGG http://boardgamegeek.com/thread/917715/multiple-creeper-question   


  Q:Can a single keeper have more then one creeper attached? Evil/Malfunction, two Brain Parasites, etc.
  
  A:Yes, as long as both Creepers are allowed to attach to the card, there can be two Creepers attached to the same card.
  
  Q:Also, do you choose which keepers get the attached creeper if you can?
  
  A:Yes, if there is more than one Keeper that a Creeper can attach to when it's played, you get to choose. If it can't attach to anything when it's played, it stays unattached and attaches to the first Keeper it can.