Unemployment compensation in Pennsylvania?

I applied for unemployment in mid-January of this year. I work a seasonal part time job so I am out of work from October until April every year. I was not aware that I was eligible for unemployment from my job because I am technically still employed. Anyway, I was accepted for benefits (because of decreased work hours) and have received my first two payments.

The other day I called to file for unemployment back pay dating back to October. Has anyone ever done this and been accepted to receive the back pay? Any ideas on how long it will take for me to find out whether or not I will get the back pay? The woman I talked to couldn't really give me a timetable, and she was quite rude about it.

Ideally, I'm hoping to have the money within the next two weeks.