Tescos Credit Card anyone?

i cant find the original letter now, but i remember something about them saying it would increase to 2500 (woohoo!!) over the first year "if i managed my account appropriately". not sure after that, presume theyd increase limit if asked. as someone mentioned above, i now have 2 cards as the tesco limit is too small, which was never my intention or plan.
 

2 cards meaning 2 govt duties to pay
 
When they say manage your account appropriately, is spending up to the limit and paying the min payment when due managing it appropriately?

I had an interesting discussion with MBNA regarding this and apparently doing just that is against their terms and conditions.
 

ive really no idea what they mean by it. cant see how doing that is against terms and conditions though, as long as you dont exceed limit and make min payments then surely youre within t&c (altho attracting interest charges)