Greatings Terry, Ill try to answer all your questions now.
1. Yes the last command can be an attack comand
2.Yes you should see the tree icon, but give your troops some time to align in the forrest before juding if they are hiden or not, if the treeicon does not show you are not hiden.,
3.You should dobblekicj when you are close however some units charge at the last moment anyway.
4.I dont really understand that question, if you are talking about tight, close and wedge ()wich i think you are not) then Yes they are very usefull, as for the preset group formation, i conmsider them usless an deploy may troops exactly as i Want to.