D.M.
Couple of things to consider.....
With twins are they are a set routine or on demand with sleep and eating?
With my twins, I had them play, eat and sleep simutaneously for my sanity.
I also used paci's, bottles before bed,(rubbed teeth with damp washcloth)and warm double layering footed pj's in the winter, transitional teether pal rabbit or bear for company for them in their cribs, several pacis (3 or more) around their head to find in the middle of the night.
After all of the essentials, I would put my 7mo olds to sleep for the night at 7:30-8pm after their end of the night bottle. If they woke up 5:30-6am another smaller bottle 4-6oz and lay them back down until 8:30-9am. This early morning feeding if they woke up was given by my hubby before he went to work so I could sleep in.
Middle of the night crying, we ignored it for 5-10 minutes, shhhhhed, gave a paci and left the room promptly if they persisted. No feedings in the middle of the night, My hubby got up sometimes even though he worked to do only the same thing and go right to bed. No rocking, and do not pick them up, that wakes them up more and then they are wondering if its feeding time or Mommy time? I didn't want either at 3-4am. Best wishes, 7months is such an adorable age.
Mom of 3yr old twins