Like a fox hole it's always nice to have 2 or more entraces / exits, Leia and that dude that's infront of the bad bluescreen does indicate that there are more than one entrance / exit.

North and south entrance was it?!

Well, medical droid or not, that droid might think it very helpfull for the rebs to get these heavy items loaded and why would a droid have "thoughts" like these?

Well it might have been around for some time and like many other droids have a unique perspective and "sentient" ( see for unique droids: R2-D2, C3-P0, IG-88 ) on what is needed or not in a war situation..