The PIES validation error item count on the Dashboard analyzes your data against both PIES 6.5 and PIES 6.7 validation rules.

The default view for any item is PIES 6.5, unless you have selected a Scorecard ahead of time.

If you click into an item with a PIES validation error and do not see a red indicator to let you know which segment(s) has the error, toggle to PIES 6.7 from the Scorecard drop down to double check.