How to change a club's manager in the editor?

Hello, I'm hoping you can help me out. I'm trying to turn a Scottish Juniors team, Spartans, into a fully-fledged club. Using the editor, I've made the following changes - all of which do show up in game:

Moved them into the Scottish Third Division (moved Annan out)
Given them league history in the East Scotland Premier
Given them a GK coach, a Head Physio and an Assistant Manager
Given them a Managing Director.

One thing I can't seem to do is give them an actual manager. At first I removed the existing manager from the club in the editor and created a brand new person (Dougie Samuel) - but when I went to look at Spartans in-game it shows them as having no manager. So I went back to the drawing board, created a new data file that kept the original manager in, but changed his name. In-game, the club still showed as having no manager. Finally, I tried a game where I didn't load any custom data (i.e. vanilla FM) and Spartans still show as having no manager - even though in the editor, in the original data base, he is there. Does anyone know what's going on?