Very strange order/ability problem

My map uses many triggered unit orders. I was working on (seemingly) unrelated things in the map, and suddenly I noticed many of the units didn't respond to the triggered orders. Then I noticed that all of those orders involved casting an ability, most of them morphing abilities. I changed nothing with the order triggers, and I did some debugging and there's nothing wrong with that part of the triggers.

I may have been tweaking the units' hp and damage at the time (the event that triggered it to stop working?). I hadn't changed those units for a long time before (I think), so I'm thinking that changing the units may have kicked in a new patch or something that made it stop working... I have a backup map where it works, I can also use that to help me debug.

ANY ideas, suggestions, similar problems, questions? I'm stuck...

[edit]
I just tried changing one of the units in the backup map, and it still works. So, I'm still confused...

Ordering complete unitgroups will only affect the first 12 units of the group, as if a player had a group of units selected and ordered them.

Picking every unit in the group and ordering it individually or iterating through the group in a loop will fix your problem.

It only issues the orders one unit at a time, so the unit group thing wouldn't be a problem. Again, it was working perfectly for a looong time, and several triggers stopped working all at the same time without me changing any of them. That's why I didn't put it in the trigger forum... But, the more suggestions here, the better the problem can be narrowed down

I took another look at the triggers (without changing anything), and now it all works... I'm not much less confused than before though. I did save the map after looking at the triggers (double-clicking them and then choosing ok), so it's probably some bug with obsolete patches or something, and looking at the triggers made them work again or something...

One more bit of information: all the abilites were custom abilities, and "without a target". The abilities that target a unit (or a point too I think) never stopped working. I don't think I need help anymore, but I'm curious as to what happened, or if it's happened to anyone else.