Without seeing the entry it is hard to say, but the most likely reason is that in the register entry, in the account block you are using the same bank account, when it should be the expense or asset account you are paying for.

Check the entry and if that is […]

Resolution for 'Check the entry issue: 'When I enter a check/payment directly on the register it automatically adds a line with the same amount as a deposit so the bank balance doesn’t decrease, how do I fix it' available: Yes.

The Check the entry issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the Check the entry issue yourself by looking for a resolution described in the article. If it is a complex Check the entry issue or you are unable to solve the issue, you may contact us by clicking here or by using other Check the entry support options.

For more information about resolving issues related to Check the entry in Quickbooks/QBO or to get support for the issue 'When I enter a check/payment directly on the register it automatically adds a line with the same amount as a deposit so the bank balance doesn’t decrease, how do I fix it', click the link below: