CompuCom Billing Analyst interview questions

I went through a temp agency, had a phone interview then came in and had a one-one interview with my first line, then my second line and finally a seasoned employee of the that would equal my station. They asked good questions and I was offered the position before I left the building. I was offered a permanent position after my 90 day temp period, but it took them 3 more months to process the hire. The negotiation of rate for the permanent position went well, but when provided with the documentation the rate had lowered from what was agreed upon, they did fix it though. I was offered the option to work from home two days a week, since the drive to work is extremely long, but after I started that was downgraded to one, even though it was a condition of my accepting the offer, but since I did not get it in writing, I was not able to dispute it.