Quick qtestion: How is turn order decided?

Seems like standard 3.5 initiative to me. That's (d20+Dex mod+other relevant modifiers) for the uninitiated

Does the turn order change each round.

No, it's generally the same every round, but like Zoro does here, a player can choose to delay their turn, essentially moving their place in the turn order farther down the line.

By what the screen-caps give.

Good to be back! My computer gave out and I've only just now been able to procure a "back up laptop" that is my primary computer for the time being.

Good to see all of you again!

In other news, is it just me, or does Chu look like he's drunk?

It's not just you, but he's blushing because he's Tsun for Usopp.

Where is this Raxn guy? haven't seen his comment since a few pages. he left the comment section sometime during 2016?