Moveset of every Pokemon hasn't been updated, hencewhy it doesn't show. This isn't bug, just hasn't been implemented/updated. It is on Shane's to do list.
A Pokemon has 5% to have a hidden ability when caught in wild in PRO (if the said Pokemon has hidden ability), although some abilities may not work due to not being coded in, which will be coded in future.
Server crashes aren't something we can predict, and if we are taking down server for maintenance, we inform via System message, which can be seen inn ingame channels.
When you get Cut (hm), then go to route 2 and take the path which is blocked by tree, then enter Viridian rest house, there Professor Oak's aide will wait you to give you Flash.