I've seen that most corps have two stick bags, one on each side. How exactly do you get the sticks out into the right postion of your hand? Do you just slightly let go for a second and let the stick slide up into the right position as you take it out? I've seen tons of people do it, but I don't really understand how.

Yes!

You grab the top of the stick and you just pull up and catch it at the playing position. It's almost like tossing the stick up, but keeping it pointed upwards.

It's just a quick, flourishy way of switching/getting out sticks. Perhaps the quickest.

There are two methods...one of each pair of stick in both stick bags, or one pair in one stick bag.

cavies actually had 4 stickbags this year on their tenors.

really?
they march sextets, right?
how would they have access to all four?

When you mean four stick bags, You mean they had two double-slotted stick bags, right? Because I'm pretty sure they would only use snare stick bags for more sticks than the first bags couldn't carry.

I'm pretty sure when i saw them in the lot at finals it was two double slotted bags

there are also stick bags that go on the inside part of the tenors, but i didn't pay attention and notice 4 stick bags from cavies.

I know they only had one 8" spock, there was a thread that discussed it here. I am pretty sure they had four-two slotted stick bags. One on the inside of each drum.

Jeez. How many different kinds of sticks did they have?

I would Imagine, Though I don't know for sure.

-A set of sticks
-A set of mallets
-A set of felt/yarn mallets

I'm kind of doubting them having 4 stick bags. How would they mount them? I'm not saying your wrong, I'm just having troubles figuring out how they would mount the stick bag.