It is important to understand that for scoring purposes having reported balances on all of your cards is not ideal. If you aren't looking to maximize scores, there's no harm in having reported balances on all of them, so long as the balances are small (less than 8.9% ideal, less than 28.9% still acceptable). It would be recommended to go from having balances on all of them though to having balances on just one if you were considering apping in the next 30-45 days.
