Credit Cards are a relatively new addition to the ICB report. UP until now a credit card would only appear on the report if you defaulted on the card, (i.e were so bad with repayments that they cancelled your card). The odd month of mist payments wouldn't show up.
Now I think you'll see missed payments, just as you would with loans.
I can't see any reason why they'd record that you did not clear our balance in full.
They have no problem with that, they like it in fact. As long as you always pay your minimum you should be fine.
Remember the ICB doesn't "score" you. It's up to financial institutions to decide if they like you. The ICB report shows both good and bad history.
-Rd