Just to be clear, I am using Easy CSS Menu 4.0, not EBMM. I couldn't get it to work in the tool, but I was able to manually adjust the HTML to call the hide function.
The hide function works, but the very next time I go to the menu, it drops down with the values pre-chosen from last time....and the 3rd level is on top of the second level.
I have included some screenshots of the way the menu looks during first click, and then second click after calling hide function. It doesn't look correct.
First click looks OK
Subsequent clicks look wrong