My reason for posting is to ask a question:  I don't understand the layout of Jane's house.  He enters through the front door, goes upstairs to look at the bedroom with the smiley face and then leaves through a back door, crosses a courtyard and then enters a second building.  The second building is also his because it has his safe.  

Lisbon pulls up in front of the first building, presumably sees the lights of the second building through the window and runs around to get there.  But all of the suspects appear to pull right in front of the second building, no questions asked.    

The second building explodes.  

So, firstly, what's the deal with Jane's house?  Is there like a pool house or something?
Secondly, how would the bomber know which building to bomb?  
Thirdly, how do the suspects know to go to the second building?  Jane's car is parked in front of the main house.  You would think that each person would do what Lisbon did (park in front and then walk around) rather than parking right in front of the second building. 

It does make me think that either a) Jane planted the bomb himself and didn't want to blow up his main home or b) one of the suspects brought it in with him, making him an RJ associate taking one for the team thereby suggesting that RJ is not one of the 5 -- or 7? -- but rather holds a grudge against this lot.

Still don't know how they would know to go to the "pool house".  

Ideas?