Here's what I'm seeing in my club. Click the pic for a larger version. WGTniv owns the club and nivlac is the regular member. The X listed below nivlac will get rid of him ( i have formatting issues on this page, typically the X is on the far right side). After I click the X I'm asked to send a message to nivlac letting him know why I'm kicking him out, so it is working on this end.
If you are not seeing the red X, can you please post a screenshot showing me what you are seeing? Or is it that you can see the red X, but clicking it is not causing the confirmation window to appear? That would be strange because if it works to remove pending members then it should work to remove existing members as well.