I have few elemantary questions about these planes.

-For soft/short takeoff, C172 use 1 notch (10 Degree of flap). However I see that Worrior uses 2 notch according to the POH. I'm guessing it has to do with low and high wing. Can someone explain why this is? Also do you ever just use 1 notch of flaps on Worrior for short/soft takeoff's?

-On cessna 172. the fuel tanks are connected to one another. If so, why is it that you have different amount left after a flight? I mean even if different amount is burned on each wing tank, wouldn't it even out after it is parked for couple hours?

-I'm confused why Piper warrior is also called cherokee. Isn't Piper a company and Worrior PA-28 model of aircraft? So why add Cherokee? So when we call ground for clearence, we tell them that we are Piper Cherokee Warrior PA-28???

thank you!