Hello mrjohn,
No problem, this has been happening to me as well. So listen carefully and excuse my English I am Russian.
1. The huds will only appear when you compile and create the game (Build the game)
2. You can only select two character when you are testing the game. The 4 characters you will be able to select when you build the game. (build game at the top lol)
3. What are you standing on? terrain? (entity's or segments?) may you upload a picture?
4. lol a week? no the x10 forums are always active, we have a very close community. Perhaps more close than x9. We are like family, we look out and help one another on these weird problems. One day another person will have the same problem and you will be able to help him
"I haz no sig :o"