hi,

You may be missing the match interrupt because you have the PCA timer and the interrupt system disabled at the time the match would have occured.

no, Michael.
When PCA module in Compare Mode (here: MATn bit is set) then ANY match between CH,CL and CCAPn is "remembered" into CCFn. And if bit CCFn is set then PCA ISR will be executed when it is allowed by interrupt system.
Anyway, interrupt system does not enable/disable match detection. It just enable/disable its ISR execution.

Regards,
Oleg