Did I just get scammed at the airport by immigration?

Got a reentry permit for me, my wife and child. Few weeks ago I paid 1,000 fee each and that was it. Today the lady asked me for 1,200. I asked why? She said service charge to copy passport and because I didn't bring the filled out application downloaded from the Internet.

So I asked for a receipt. The receipt shows 1,000 as well. So I asked again about the 200 and why it's not on the receipt. She answered "receipt only for reentry permit not service charge"

So I shook my head and left

Hi ! So im back since i made my visa ED 3 month ago. I have to extend in the end of this month. I got 2 choices : Extend 2 months or 3 months. 2 months = 1,900B or 3 month 4,900. Why its expensive more ? (3,800B normally right ? For 2 extensions) Its not 1,900B for 3 months ? They told me if i extend 3 months and i have to go back to my country (like 2 weeks) I still get my visa ED but in fact if i go out it cancel my visa ? Im so confuse and the more i ask them the more im confuse.... :(