Cant equip stacked armor.
Once equipped it reverts back to 1 x stacked.
Only solution/work around is to place the stacked armor in the hot bar, then mousse hover over the armor slot and press the hot bar number.

You aren't supposed to be able to stack in armor slots at all. When the armor gets damaged in a stack, all of the items get damaged, which makes having a stack there useless. If you can provide a legitimate reason for having stacked armor in armor slots, I will consider adding an option for it.

Well let me explain how the mechanics really work.
If you separate the damaged stack then yes, all the items will have the damage, however, if you are fighting and the armor breaks then broken stack is decreased by 1 and the armor that was "behind" starts fresh with no damage. This is useful for PvP servers with high enchants.

I made a 40 second video to show it:http://youtu.be/sHRdqQwsC3c

Bukkit has a glitch / exploit that allows for people to stack infinite amounts, your plugin can be the awser to stop it, i searched everywhere the is nothing similar around.

Because you can remove the stack and have all of them be damaged and you can repair items fully by getting one destroyed, it is currently a bug and I will be fixing that. With that said, the way you describe stacking items matches what I once tried to implement called 'Virtual Items'. It is something that I plan on attempting to implement again, but for the time being is too complicated to deal with all of the edge cases.

Your video is set to private so I can not view it.

Please explain this glitch that allows infinite stacking, I have not come across any such issue.

My bad. The vid is not private anymore.

The glitch works like this. People usually use essentials overstack option to have amour and some other pvp stuff to be stackable to a certain limit. The problem is if a player has 2 stacks of the same item click one stack (to move it) and right-click another stack wile in inventory it one of the item is transferred to the other stack.

Your plugin as is, is already is an answer to over stacking glitch.. the only problem is not being able to equip armor.