Cards with numerical skills

By kaltorak, in Warhammer: Diskwars

Hi, another question:

playing with the expansions we found some cards giving the troops "numerical" skills: for example Reanimate 1 or Guard 1.

What happens when such a card is played on a disk already having the skill.

Do they sum up? For example, if a necromancer has Reanimate 1, playing Invocation of Nehek (give Reanimate 1), yo can give him Reanimate 2?

Thanks in advance!

Yes