What happened to this added directory in environment variables path?

Added the following directory to the path by using this method:

set path=%path%;D:Programmjflex-1.8.2jflex-1.8.2bin
set path=%path%;D:Programmjflex-1.8.2jflex-1.8.2binjflex

but, I can’t find it in GUI (user/system):

But by using echo(%path:;=&echo.% got this:

Now I’ve got a few problems:

How do I remove jflex from the path using cmd (preferably)?
Where is it? Cause I can’t see it in system environment values but somehow it’s still there (with cmd)?
Update1: What just happened?

BTW the jflex command does work, so it is in path and working perfectly fine.

Update0: Not in Registry (I think I looked at the right place, if not tell me):

Update1: Ok, now this is weird, now it’s gone…what happened exactly?