No movement+invis=hidden unit?

I've posted this before, but I think it went fairly unnoticed. Here is the problem. The unit is confined to a region unless it uses an ability which will move it to another region. Depending on which ability it uses, the unit may become invis/shadowmeld. However, I need to confine the unit to the region and not allow it to leave.
My first thought was to set it's movement to 0. That doesn't work cause then the trigger to move unit instantly doesn't work right and the unit doesn't actually move.
My next thought was to set it's movement to 0 after the unit gets moved, however, for some reason with the invis/shadowmeld ability, the unit becomes hidden so you can't select it or anything.
Then I was thinking of just checking to see if a unit was going to leave a region. This seems to be my only chance at this time, but I'd have to turn off and on the triggers if I were planning to move the unit out of the region using a trigger.
Does anyone see another way around this? I'd appreciate any input.

You can set i't's movement to 0 and when you run the trigger
ot move him instantaneously (did I spell that right?)
You just return the the unit's movement to it's original valua just before you move him instantaneously.

And that selecting problem? I don't know you didn't tell all the details but If you own/control the unit and it shadowmelds
you should still be able to select it.

Yeah, that's what I thought. But for some reason, the unit comes up hidden. Here is what I did. The unit has a movement set to 0. Then, when it is suppose to be moved, it is given an item that gives it shadowmeld or invis(tried them both) however, the unit seems to vanish, except there is a shadow where the unit is suppose to be and there is a selection circle in that area showing that something should be selected, however, there is no unit. And nothing shows up in the window at the bottom. I haven't figured it out just yet. I also tried it with a movement of 1 and then taking away the movement. That didn't work either. But only when I leave it with a movement of one does the unit stay. Of course, I need to keep the unit from moving. so...

if u dont want it to attack either pause it. but if u do, check the abilty the item or shadowmeld(if u edited there abilties) that the cloakage is set to what it normally is, if not im clueless

yeah, it's still set normal. And the unit has no attack, but does have abilities to use. Guess I'll have to just do this the hard way...

The Ghost Ability ...

ghost ability?

YE~~you can ADD a ability named Ghost on a unit ~~:)