Yes, be careful with what you ask for. Connecting rooms have the door inside that opens in between the two rooms. Adjoining rooms are next to eachother and you have to go outside to get to the other room.
You can request connecting or adjoining rooms (depending on your preference) but nothing is guaranteed. We;ve had pretty good luck with our party of five adults. I make the room reservations at the same time - two adjoining rooms, one for my husband and me and one for my in-laws. Unfortunately, we always get connecting rooms. I love my in-laws but would like more privacy since they insist on us leaving that darn connecting door open all the time. Sigh, I try but get connecting anyway.