With my Guild master we found out that even though he is the guild master, when trying to expell rookies/initiates from the guild, the "expell" button doesn't appear, while this button appears when an administrator tries to.
They were members (yeah, this case often happens), because when I, as an administrator, tried to expell him, it worked. This issue was only for the guild master
Turn down the resolution of your monitor or open the drop down menu, move mouse outside of the guild window and then scroll down.
With the resolution to high, the text just doesn't fit.
I juste tried to connect on his computer, without changing the graphics, and the expell button still appears for me. Unfortunately, i don't think this is a resulution issue
(thank you for answering anyways )