Great question! The answer is ‘kinda’. You must make sure the skill is from an acceptable category for the player type. For example, a Human Blitzer can choose from General and Strength. You could give two Human Blitzers Mighty Blow, one Blitzer Guard and the other Mighty Blow, and so on. The skill must be from a category they can normally choose from. The exception being Stunty teams, who have some ability to select doubles. An example of a double would be a Goblin team Troll taking Block.
Does that help, @MexicanNinja? Feel free to post your sample roster here, and we can help. I plan on posting my Dark Elf roster soon.