I am using a 3 way adaptor on a vehicle to launch 3 satellites in space. The problem is the satellites do not all go on the adaptor. The first satellite attaches just fine, But the other 2 can not. I can't figure out why they won't go on. I have seen videos of 3 satellites attached but they don't show how it was done. The other problem is that the satellite I made is saved in subassembly but I can't save it with the probe core on it, so I need to add it to the other 2 after, but it won't let me attach it. Any help would be appreciated.
EDIT: I can attach the extra satellite upside down, but that isn't what I want.