What is the difference between hero abilities and abilities added through triggers?

In my map the heroes learn there abilities through triggers by using items. My problem is that I can't get the save/load system that I use (WEU's system) to save abilities that are added trough triggers. If I take the same skills and add them to the hero skill list then it saves them fine and remembers the level of the skill. I also have a problem with saving skills added to spellbooks with triggers. I'm guessing that these problems are related. Is this simply a limitation of the save/load system or is there something inherently different between skills that hero's start with and level up and skills that a hero acquires through triggers?

I don't know if there is some setting I can change in the object editor to make the abilities act like hero abilities or if it is something i can do with triggers. I have tried both making the abilities permanent and setting Hero Ability to True in the object editor.

Thanks.

Learn to use that system, or make one yourself.

Most likely that hero "load/save" system needs to know about the existence of those abilities

The WEU save system (while never working for me in the first place), is almost positively likely to be very rigid and unhelpable. Making your own save/load code will solve all of your problems, as you'll be able to set everything you want to be saved, and everything you want to be ignored. Vexorian's codemaker engine is very nice, however, and is very flexible, customizable, and user-friendly (at least if you know some Jass), so you might want to try that if you don't want to start from scratch. Remember however, that any system that you create specifically for your map will probably work better in the long run.