when you enter the bill for 60 and save, are you then using pay bills, selecting the bill and applying the credit?

Resolution for 'AP summary issue: 'Vendor has a balance not showing on AP summary' available: Yes.

The AP summary 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 AP summary issue yourself by looking for a resolution described in the article. If it is a complex AP summary issue or you are unable to solve the issue, you may contact us by clicking here or by using other AP summary support options.

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