Can an uninvited vampire brought inside a blue house move freely about it?
Yes. There are two ways an uninvited vampire may appear inside a blue house. Since vampires can still attack good characters inside a blue house through the door, it’s possible for a newly sired, and uninvited, vampire to be inside a blue house. The other way is for a good character to cast the Spell of Evil Summoning to bring the uninvited vampire onto a space inside the blue house. In the first case, the newly sired vampire has always had an invite into that house and may move freely around the house until it chooses to leave. At that point, assume that the rest of the Scooby gang casts the necessary majik to ‘uninvite’ that vampire. In the second case, summoning a vampire into a house is a clear invite. Again, the summoned vampire may freely roam the house until it decides to leave, at which point it is uninvited again.