How can I extend my visa in Mae Sot, Thailand, and what is the process involved?

Easy Mae Sot extension: I entered Thailand at the end of December on a visa exemption (US). I extended for another month in BKK then came to Mae Sot to stay a while. Yesterday I went to Mae Sot Immigration and asked if I could extend again and they did it for another month with no questions asked. Or at least they accepted my application and told me to come back in 15 days for the actual stamp and said that it would be fine. I was given an "under consideration" stamp for the few days between my expiring visa and the new pending visa. I was hoping for 60 days, but I asked her what I could put in the "how many days" space and she told me to put 30 days and I didn't feel like pushing my luck for more. I was the only person there and they were very friendly.