I don't understand these limit structures. What does this mean?

[The_Tracker]

Ok, this is probably a really stupid question. I have been primarily an online player of the last few years but am getting ready to move to Henderson NV.
So I am looking around the "internets" (GWB dig) at a good brick and mortar to play limit hold em in the $1/2 or 2/4 range. Most of the rooms spread a game that looks like this.

$ 1 - 4 - 8, $1 - 8 Hold'em.

$ 1-4, 8, 8, 6-12 and 10-20 Texas Hold'em

$1,4, 8, 8, Texas Hold'em.

This is not making sense to me. How is this diffrent from the standard $1/2 or 2/4 or 3/6 or 5/10 etc. games played online? Can someone help me out here?

This is the site I am refering to.
http://www.lasvegasvisitor.com/pokerrooms.htm

Where can I find a nice loose $1/2 limit game?


Thanks!