Most of the times the issues are generally from the API end. I generally look at balances by Exchange report every week and if there are any differences I add manual entries to make sure that the balances match. Most of the times the issues are generally with deposits and withdrawals. Adding manual entries fixes those issues.

On Steemit you can't update the articles. I will make a new post with "a more specific guide on how to handle and balance all the quirks of the different imports and how to solve some typical issues you've had?" as you have suggested.