Turning Stone 1/3 Limit

I went to Turning Stone yesterday, should be going more now that I realize it's only about an hour from my house. I sat down at a 1-3 Limit, which was odd to me to start since I'm used to playing online and had only played in a casino at Foxwoods where the lowest limit was 2-4. SB/BB were both $1. The odd (to me) thing was that before and after the flop there was no set betting structure, calling was $1, but you could raise $2 or $3, and reraise in the same manner. I've never heard of this before. Also, new players didn't have to post when joining the table. Are these rules fairly common?