Talents and powers

Be Mine Beginner
Sep 23, 2012
A couple questions:

1) What do the "Loud" powers do exactly? According to the description they boost combat threat... does this make you more/less likely to be a target in battle?

2) It seems that some passive abilities stack and that others are replaced by their higher level versions. For example, I have Loud 1 (20% combat threat) and Loud 2 (10%) in my list of talents and powers. I'm guessing these stack for 30% combat threat. On the other hand, I have elusive 1 and 2, but only elusive 2 shows up in my abilities list. Does this mean that elusive 2 replaced elusive 1, so I'm only getting the benefits from elusive 2?