William Morder composed on 2018-06-24 21:42 (UTC-0700):

> I am trying to imagine what you mean, 
> as it hasn't happened to me. However, if you can do this through the 
> keyboard, then it might give you a clue to the problem, as something else 
> might be interfering with your mouse. 

I don't need any clues what the problem is. There's no space between the two
targets. The pointer only has to move as little as one pixel to shift from one
target to the other.

Imagine you are 100 years old with arthritic arms, hands and fingers, and eyes
that don't work like they used to, trying to use a mouse or trackball. If you
can't, goto an assisted living center and watch old people trying to use a mouse
or trackball. The coordination and eyesight of an average 14 year old is ancient
history. Clicking a button without moving the pointer off the intended target
takes a lot of luck.

Simplest solution would be to remove never to be used menu selections. Some null
space between targets could help.
-- 
"Wisdom is supreme; therefore get wisdom. Whatever else you
get, get wisdom." Proverbs 4:7 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/