Hi Melanf,
What you mentioned seems strange to me. However, not be able to see the set up you have, there could be something blocking you Group Admin. There's a couple things to confirm in order to make sure the Group Admin has the right permissions. Sorry if these you already know.
1) Verify you have given the correct Access Level (and License) to your User in order to be a Group Admin. This is typically all Access and the Plan license.
2) Verify the User is set as a Group Admin for the Group the Team is in. You can do this by going to the Member area of the Group. You should see the Group Admins at the top. If they are not, add or find the user and make them a Group Admin.
3) Verify the Team is in the Group. Remember, that some Users of a Team can be from other Groups.
4) In the Layout Template, verify the Assignments section (top right of the Layout Template) has the Team (or Users) present.
Let me know if these help.
Best,
Joaquin