Iv been muzzling my staffie everytime he bites or snaps, but i have been told muzzling a staffies effects they're behaviour and makes them more aggressive is this true?

One would normally muzzle to avoid a dog snapping not after the act, I don't see the point in that.

When is he snapping ?

When he's told to either get down from somewhere or leave a room, he stares for a few second then jumps up and snaps

Then i would say no, dont use a muzzle as all you are doing is preventing a bite - you are not actually addressing the behaviour.
As you havent had him very long maybe the previous owner allowed him on furniture and the free run of the house ??
It is very rare for staffies to snap at people
How are you actually telling him ?
Do you raise your arms or shout ?

any suggestions on how to stop him snapping?

Personally I have never had to deal with a snapping dog so cannot offer any constructive advice .
But you may need to be aware of your body language when you tell him off.
What was his previous owner like ? How did he treat him ?
As your home is still new to him he may be feeling a little insecure .
How old is he by the way??

The last owner was well.... a 'ned', from what i seen he was treated fine exept he has a few cuts on him, i just point in the direction i want him to move in when giving him them orders, i dont yell. he's 11 months old

A Ned ?? what does that mean ?
If he is feeling a little insecure - or if he was hit in his previous home he may feel threatened when you raise your arm.
Just a thought :)

My husband's name is Ned. He's not horrid to dogs.

www.chavscum.co.uk aims at 'neds/chavs' dont get confused with mens name..

JG
Have a look at this website
does your Ned need to tell you something ????

Peasant underclass?!! Not really the first description that springs to mind! :D

Ned= non educated delinquent ;)

Hmmm I think a "Ned" might be a Scottish term.  We have lots of them on the estate where I live.  Your typical Ned will have a big dog, rottie, dobe, akita or similar, or a staffie or bull terrier.  Neds wear tracksuits, are aggressive in nature and will abuse you and your dog at every opportunity (when theirs are at fault).  Their dogs will not be trained or leashed and if you ask them politely to recall you will be met with abuse!!!  Neds are to be avoided at all costs :D  This is a serious post!

CG

Hmmm will remember not to wear a tracky when walking Gus then incase I'm mistaken for a ned- :D

Why not keep your dog on lead this way you can tell your dog to get down with a correction of the lead at a safe distance and always treat/praise after.

:(                                ;)

Hello you say you just point to where you want him to go in my experience pointing involves aising your arm maybe this NED used to tease him some people seem to think its funny to tease staffs. When you say snap does does he follow this up by trying to bite you or is it  one off snap?

Karen 

is your staffy food oriented.If he is I would try to 'bribe him'.Tell him off and entice him with food.When he gets down reward him.Be consistant...NEVER allow him on the furniture.You should always have a bribe ready and never think 'oh I'll let him just this once'.
I would also not allow him upstairs and make sure you do some basic obedience...make him work for his treats.He believes he is superior to you and he needs to learn otherwise...but by nice methods.
Archer  

You can't put up with this dominant behaviour.  Get some help from a professional!!  He's obviously been allowed to be "top dog" in his previous home, and thinks he can do the same with you.  I've never met a people aggressive Staff in my life!  People make nasty dogs!!
Please get some help!

Sarah.

Or maybe he's been pushed into feeling he has to defend himself by his Ned of a previous owner???  Either way both dog and new owner need 'hands on' help rather than advice from the 'net trying to treat problems which could have alsorts of different reasons behind them :(

One of the easiest ways to teach a dog "off" is to teach "on" :D  Using a clicker and treats with non confrontational methods.  I remember your earlier posts on getting this dog and strongly recommend that you go to some GOOD positive reinforcement classes; what area do you live in?  I am sure someone here can point you in the right direction.