Disconnect pivot tables for charting

I am trying to produce 12 separate charts from one pivot table -- each chart is filtered by a separate variable. I then need to paste the charts into a ppt deck.

My problem: updating any single chart in Excel causes either (a) the other charts in Excel to automatically update and/or (b) updates the charts in PowerPoint.

I have explored various ways of disconnecting/de-linking/etc. the charts from their data sources without luck.

Thoughts or suggestions? Much appreciated...