Sorry about that, Bean, I actually kind of missed the first question.
If you're using the Anniversary Edition, check for Spirit Services on page 186. Specifically -- if I'm understanding your question -- you'll want to read over the sub-section on
Magical Services, under bound spirits (page 187 in the Anniversary book).
You can only get an "aid Sorcery" for a combat spell, for instance, from a spirit that your Tradition associates with combat magic. For your Bear Shaman, that would mean if he wanted a bound spirit to tag along and help out on a combat-heavy Shadowrun, he'd want for it to be a Beast spirit. If he wanted one to help him with healing, instead, it would have to be an Earth spirit that he bound ahead of time.
So on the one hand, you're picking the five types of spirits you can summon. For Hermetics it's the "classic" elementals, plus Man (perhaps symbolic of metahumanity's logic being as potent as fire, earth, air, or water)...all very symbolic stuff, right? But it's also limiting them to those five spirit types, which means a by-the-book Hermetic isn't gonna whip up a Beast spirit any time soon. Beast spirits might be able to do really cool stuff that you REALLY want your spellcaster to have access to, so you could see that as a limiter. On the other hand, a Hermetic can call up a Fire spirit (and a by-the-book Shaman) can't, so maybe
you're missing out on something awesome. So you've got to pick your five a little carefully, and make sure they're the spirits you picture as associated with your mentality/outlook/ability, right?
And then comes the way they're affiliated to each spell type. It's a convenient breakdown (in that there are five types of spells, and you get to choose five spirits), for starters...but, "crunch wise," in terms of hard and ugly game rules, it's mostly only a factor for Binding a spirit (so, that stuff on page 187) and making them give you spellcasting dice.
Is that a little closer to your question?
Edit: Ninja'd by Crit, but I'll leave it.
Ninja'd? I was like five minutes before you! It's not like I snuck it in there under the radar. Sheesh.

EDIT: Just noticed that you specifically mentioned the Anniversary edition, Bean, so getting rid of my "extra" page references.