I have just updated the rules for 2 for Glory, to clarify the situation with elite, fast attack and heavy choices. You must take one of each before you can add a second and two of each until you can take a third, and so on!
For the full rules see: http://www.kids-dreams.co.uk/80401/info.php?p=14
I hope this makes things clearer!
Gary of Team Gambit