As long as they are not balling up and CRABBING and biting at each other they sound like they are fine together.
They are more likely to act territorial in a cage that only smells like one of them.
If they will sleep together during the day, they should be fine when they wake up in the evening.
I would THOROUGHLY clean the cage you plan for the two of them to share and once they are asleep together put the sleeping pouch (or unzipped bonding pouch if that is what they are in) into the CLEAN cage.
Feed them a little early so there will be food when they wake up. Put the food in several locations so neither glider can keep the other from eating. A dish on the floor, another on a shelf or using a hanging bird dish to put one or two feeding stations on opposite sides of the cage or one up high and one near the middle - any way you can offer foods with some distance between the dishes is fine.
After a few days you will begin to see them share dishes eating peacefully together then you can go back to one dish or dishes all in one location.