I looked back over my notes & it looks like I did not resolve the combat with the first resolved PEF before moving the others. I'm thinking that it was because when Sisters entered into the section, the PEF was still behind cover & out of sight. It was when the Star Marines activated and moved into sight that the PEF resolved. Since it was the Star Marines activation, I went ahead and moved the other PEFs before resolving any combat.
Did I mess up?