QB Issue Resolution:
That happens some times. It comes from your bank and there are sometimes missing or duplicate transactions. That is why it is a must to reconcile. http://www.artesanibookkeeping.com/exclude-transactions-bank-feed-qbo/
Resolution for Issue 'The CIBC chequing account sync. up was missing transactions.The CIBC credit card sync. up was having duplicated transactions.' available: Yes (Solved).
Source: Intuit Community forum.
The CIBC chequing account sync. up was missing transactions.The CIBC credit card sync. up was having duplicated transactions.: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.Support for account sync
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Error Recovery for account sync [Canada]
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