Very confused on PLO

[Trainwreck]

Here's why, I have been railbird'n it on a few sites.

Pot is $5 and next guy bets $9, the pot is $5, how is he able to bet $9?
I made sure my eye weren't playing tricks on me. 1/2 PLO, 1/2 blinds and one guy came in early with his $2, making pot $5, fold, fold, UTG+2 bets $9!

I saw a huge over bet on another site in a PLO tournament, pot was say $350, the next guy bet $800.

Please explain...

TIA!

>TW<