ours who are husband and wife.
We were together most of the time but did sperate when we wanted to do different things. eg my husband want to go to the who wants to be a millionare show so we split up from them and they rode a few rides again.
I also split up from the group when we went back to Magic kingdom for an hour before it closed and did things i wanted to do while they rode splash mountain. I rode dumbo for the first time as i was kicking myself that i missed it our first time ( we didn't know we were going to go back to Mk). I also did the peter pan ride again and got some cotton candy and ate it while watching the fire works over the castle for the second time.
There is nothing wrong with splitting up to see and do different things.