So I'm have been Roleplaying for a while now and decided to start a Pathfinder Game with a group of my friends. I asked them to start at level 7 characters (Since we always start at level 10 or level 3) and to take it easy on me. Most complied and made fairly straight forward characters while still being able to do some of the insane things experienced players can do, which I didn't mind (Why block them from having fun) but one particular player is turning my first DMing experience into a laughing stock.
He is a level 7 Witch Lawful Evil Witch (I thought I could trust him). I started with a pre-built adventure just to get feet wet before I threw them into the campaign I had prepared and to see what kind of stuff they could do so I could prepare. During the adventure, the Witch used the Slumber Hex against an Orc, who passed his Will Save, however, The Witch still said the Orc still falls asleep for 1 round. He said the same thing about Misfortune. When I asked how he said something about his feats allowed him too, however research and hours of searching afterwards reveals nothing that causes that.
Next session I attacked them with undead trying to avoid the Slumber, but he just Controlled Undead on them all. After the session I took a look at his character sheet and on the back of it he basically had listed
Undead: Control Undead
Humanoid: Slumber
Elemental: Banish
etc.
Which basically told me he had a plan to stop everything or prevent everything. And somehow he has insane Will Saves for them, and even when I save on the Hexes, they still take affect. Most encounters (Including simple Tavern RP) are basically coming down to "Do a Will Save against Slumber. Fail or pass? Coup da Gra, steal all the alcohol."
While the players appear to be having fun and a laugh from the Witch's antics, he seems to have all the bases covered. Even his back story basically amounts to "You screw with my Familiar and I'll kill everyone in the party." Because he knows that his Familiar (Which is an small Air Elemental) would easily fall to a Banish Spell (And either way, last time I took a piece of equipment away from the party to add a bit of challenge, they spent all there available time they had to complete their task shopping and getting their reagents pouch back)
Sorry about the wall of text, but essentially this comes down to two questions.
1. What's making him think that Slumber (Or actually any of his hexes for that mater) still take effect for 1 round if the target passes the save?
2. Do you have any advice to stop this menace?
Also as a side question: One of my players are a Damphire. During some sessions, she kills people and drinks their blood. After the third time in three sessions I told her to change her Alignment to Lawful Evil. However, all the other players argued that because she was Choatic Good, its' OK for her. What do you think?