Great questions!
1. Yes, you saw surveillance video of Rya Mendez and Marta is definitely not the younger Rya.
2. You made a pretty good assumption. Setting your agent to work locating the address (Google Maps) will return five different possible addresses for "Hill View" of which the closest is further east, same city level, about three miles away.
3. If you believe it is accurate, then belief is Reality. 
4. The next name on the list is a man, Hector Alvares. His listed address is about five miles away, same city level, but it is a building address according to your agent.
Having answered the posted questions, I'll let you add to your posts or not, but I am looking for a post from Keeper. Espatier, I could use something a bit more. Does Charlie readily share the information he's just received? Is any discussion going to be held? Plans laid out? Communication with Ghlahn made? Does anyone need to use the restroom? Everyone should use the restroom before going on a trip.