Snowball arena is meant to be 3v3. That part has already been corrected yesterday evening.
As for the bug you mentioned, currently it seems to be random. Managed to reproduce it but not from the first attempt. We are looking into it.
There are several ways to obtain a fragment or a full scroll.
The following mobs have a chance to drop a fragment:
Auroran Guardian Vyrava
Diamond Shores Razorbeak
Diamond Shores Crab
Diamond Shores Turtle
Diamond Shores Draugorc
Technical server restart at 7 pm 11/24!
Server will be off for the technical restart on 11/24 at 7 pm. This is the restart aimed at fixing known today's incoming siege issues.
Duration time - 20 minutes.
We apologize for the inconveniences!
Players will no longer be able to use vehicles, portals, mail box, etc in the radius of the candy event. Will be applied tomorrow after the maintenance.
Any further issues, if happen, please report in tickets.
The list you saw on our another server (RU/EU) is not full yet, so I don't recommend to check it for now. Better wait for the updates list on our NA server for more details.
As for your question, as Sjinderson said.