Multiple Editors of Single App Assignment?

New Contributor III

We had our 1:1 iPad rollout night for 8th grade students in my district last night. Everything went very well; our students went through the setup wizard, signed into JSS through AD, profiles came down, invitations were accepted. The last step was 1 JSS Admin in each of our 3 buildings would add the students to the scope of one app assignment after they had accepted their VPP invites. We have noticed that when one of us would go to add student D, that students E&F would show up as being removed from the scope of the assignment at the change of scope confirmation.
Can there be only one editor of an app assignment at a time? Has anyone else run across this? Any help is appreciated. Thanks.