This discussion may contain spoilers!
I was able to get into mama Bosco's, but I think I didn't do it the right way and to me, it appeared to be a bug.
I noticed two strange things:
1) For my first try, I selected Max to teleport to the COPS (so it should have been next to the car in front of the office, as I came to mama Bosco's by teleportation and not by car), but max appeared just outside of mama Bosco's.
2) Then I went to the roof, and I was starting to understand what I was supposed to do... From here, I teleported to mama Bosco's and Sam was kicked out of the building. Without moving Sam, I teleported Max and the gorilla to Stinky's cell phone. But as I didn't move Sam, Max should have appeared just outside the building. Instead, Sam had automagically moved to the top of the building, and I solved the puzzle. But I think the right way would be to move Sam alone at the Building's top BEFORE teleporting Max.
Is it a bug or did I miss the logic of the puzzle?
P.S. Sorry if there is already a post on the subject. As I didn't finish the game yet, I didn't want to read all the titles of the forum to avoid spoiling the fun...