When I created a Custom Unit it didnt appear on the unit palette nor was I able to add an actor to it from selecting the tokens. Did i do something wrong?

When I used to try to create units, I'd simply copy completely everything from an already-existing unit and would change things from there.
Have you tried to start from nothing?

Well I didnt duplicate the object unit but I did a "Copy from" Command.

Ok i think i found the problem. Apparently I cannot make custom units because of the existence of the decprencies from the campaign and story mode. Is there anyway i can get around that?

If you duplicate units, it should work around that. I was having that issue as well with a map I'm making, and that was the best solution I could come up with.

decprendies = dependencies?
If so, you should be aware that you can select to include all of them in your map, which should solve your problem, as far as I know.

For stuff you add in the data editor to show up in the editor selection (or to be reflected on the map in the editor) you need to reload the map

I got it working. Thanks