Sorry but I can garuntee they do and are working as intended. It is quite obvious you did not duplicate the units actors or hook the unit up to an actor and as such there is no visual display data for the unit. SC2's data editor is not WC3's object editor, you can not just copy a unit and expect it to work as you have to set up actors, weapons and all kinds of stuff for the unit before hand.
You only found this out now? Wow really I thought the term "BETA" gave it all away when you axcepted the terms of use conditions. Maybe buy the game in july as then everything should be finished (if not then you have all the right to complain). Also I would like to remind you that the beta did not even include the editor at the start to demonstarte how incomplete it was.
Yes they can, just you are not doing it right. You need to bind custom units to an actor via the actor events (so it creates an actor for the unit when the unit appears). You then need to add events so that upgrading can be performed correctly (some building actors have this aready). Please do not blame your tools for your short commings.
The fact you are comparing a beta to a well patched game is semi laughable. WC3 editor is far from high powered as the whole WC3 engine is flawed (dissassembling the code revealed many major O(n) opperations when loading object data as just one of the problems, I can list more if you want). It is clear you are suffering teething problems with the SC2 editor cause it is more complex than the WC3 one. Honestly I am having no problems with it and so are most people. It takes hours of messing to be able to do stuff, but in time you will wonder how you ever went without behaviours, abilities, effects, units and actors.
Herustic detection is not always the best. Kaspersky keeps telling me that the beta updater is a key logger so I do confirm this is a problem. I garuntee you its a false positive though as blizzard will not risk losing millions in legal obligations if it was really harmfull. I am sure Activision Blizzard and Microsoft / most good AV companies will have this sorted by release.
You DO realize you can create custom functions, right? And that these custom functions can just take less arguments than the ones you are provided with, making it easier to do tasks which you do over and over?I agree. Stop this bullshit with being a beta, I will bash you hard when the release has the same issues
For me the prob isnt the documentation but the fact that some simple things are simply missing - set life on unit on the map, upgrades, units walk through all have to use pathings, some triggers are missing, Unit groups are tons of text when I simply need 'Units Owned by Player (of type etc)'
There are some very useful features like replacing all , find etc, but many small and simple things are missing.
You can create a buff thats invisible and adds/subtracts one point to the attribute you want to change.
I gave up on making heroes using the data editor when i found out that the attributes had to be set by hand. 
I'm almost positive it doesn't.
I wouldn't necessarily know though
I'm lazy.
So me being a moderator of this section is pointless as everyone just goes to the dragon I see...
Hmm interesting problem. This is a beta and to be expected so I advise reporting it to blizzard as a bug so they can fix it. Remember that the game is released in 2 weeks time so it is important to flag up every bug you find.
