This issue is still annoying the shit out of me

The fact that I can't click once on a doorway to enter is driving me nuts. I have to get lucky by clicking multiple times. Often it leaves one guy in the previous room. Forcing me to switch to that screen and getting him to join the others again.

Seems like it might not be such a big deal but after playing for hundreds of hours it's starting to really piss me off.

Is there any suggestions on how I can fix this???

Any advice would be greatly appreciated.

Wow I'm the only person with this issue?

Nope. You are not alone.

My chars died when I zone in where there is a bunch of elite waiting to rape my chars while 2 of the chars still on the other side. Nothing much can be done even though someone have posted it on how to zone in with all the chars.

You should set 4 separate keys that map to mouse clicks in individual windows.

This is my setup
F5 --> Left Click Window #1
F6 --> Left Click Window #2
F7 --> Left Click Window #3
F8 --> Left Click Window #4

When all 4 characters are in front of a doorway I hit F5-8 in sequence (one after the other, not at the same time) and they all go in without any issues.