For the chain to touch the swing arm that means the chain would be very slack in my mind. Ive read many posts about adjusting your chain but never read that.

Mainly if you adjust the chain go mid way between front and rear sprockets and you should be getting around 30mm movement, then turn the wheel a 1/4 try again, you will get different tight and loose stops and as long as the minimum movement is 30mm you should be ok. Also make sure when your tightening up the spindle that you push towards the front of the bike or the right hand side adjuster plate with become loose and mean your wheels out of alignment a bit.

__________________
Plough on