I don't know how this happened, but I bet it's cuz of all the waits. In my map, it all the Firebats are supposed to be created in same time, but there's 8 areas they're created. Now, number 1 (far left) creates the most, like there is less wait time between creation) and after number 3, it just doesn't work, but sometimes number 4 works... In my map, I'm talkin about the ladders in my Helm's Deep map.
Help!
u have 2 many wait triggers goin on in player 3...try using death counts
For Example:
Conditions:
Always
Actions:
Add 1 death for (any unit)
Preserve trigger
Conditions:
Player 3 has suffered at least 30 deaths of (the unit u used)
Actions:
Subtract 30 deaths of (the unit u used)
Create firebats at 1
Preserve Trigger
lol yeah, Death Counters seem to solve everything. They are the best thing to use.

Here is a tutorial on a complete guide in learing what Death Counters are and what there purpose is, if you didn't already know.
Death Counter Tutorial By LegacyWeaponPfft, I know what death counters do. I didn't want to switch to them, cuz I'm a very lazy map-maker...
I'm making an RPG with all death counters... I was thinking ther ewas a way to fix it by NOT switching from waits...?
Hey I didn't know if you knew what they were or not, just trying to help you. That's good that your making an RPG with all death counters, that's the best way to go.

Well, switches for randomized computer's attacks lol...