jennyb -
recently I have not let her out. Once she was calm I thuogh it ok so I removed my gloves and played with her for a while until she bit me again while jumping on to my hand. later she went straight for my ears when she jumped onto my shoulders from a shelf. She has one place in her cage where (I think) she stores her food. it's one of those hanging flower pots, I've seen Kanchho perched on it (with her upper body inside the pot, sticking her tail high in the air), she also clawed the inside to mix it with some shredded newspapers. Thing is ever since I bought her that last summer, I never thouched it. Besides, it now turns out she tries to bite me when jumping onto me from somewhere. Not trying to say you are wrong here but most of the time I' see her cheeks puffed up with all the snacks+food I gave her. Ever since she passed her infancy she never seemed happy to be in her cage, I mean when she was in the tiny cage, she would pace sideways and chirp often. She stopped chirping though when I built her a bigger cage (minimum size), but pacing, begging to let her out did not change. When someone comes close, she will climb up to near the person's shoulder level (the limit).
I don't know if this has to do with protecting her food but just today, I found her shredding the center of a large piece of newspaper she uses as her urinal(?). That newspaper is stained with her own dried urine and she was digging through it. When I came close, she suddenly became extremely aggresive( the past 5 days or so she's calm in the cage at least until a while after i let her out), running in full circles up and around the cage, letting out little squeaks of range, trying to bite me through the bars. I'm assuming she was hiding her food there.
I hope things I mentioned previously gives a clue of some sort

to everyone -
Following what Tarcus told me, I am considering building her a bigger cage than the one right now, but first a conflict with my mom is unavoidable. Mom still believes a big cage is not necessary and that a tiny one is enough (I was planning to built a much bigger one but mom wouldn't allow me, that's why the cage was cut down to minimum size). I talked to her today, told her building a bigger one may be the best I could do to fix her aggrassiveness. She suggested a deal; I build a bigger one and see how Kancho does for about a month or so, if she becomes gentle as before I can keep the bigger size, but if she does not change, I have to cut down the size to half of the current size as kancho's aggressiveness had nothing to do with cage size. I think of this as a risk, it might suceed but if not, kancho's cage size will become even smaller and I'm afraid that will worsen her condition. Kancho's current cage size is 30X70X110 in cm btw. I could ask this to my friends but none of the owns a chipmunk and a lot of you guys out there seem to know more about and have more experiences with chipmunks, so what I want to ask here is; will it be worth the risk? Is shrinking the cage most likely going to worsen her condition?
I have two choices here; either accpet her deal and gamble
or try to convince her smaller cage is torture.
Can any of you guys please help me out?

P.S My Knacho's 2 years old and she still has not entered heat, is there a reason to it?