clearvue mini-cyclone

I purchased a mini clearvue to use with my Festool CT-22 and Shop Vac (SV) vacuums.  I've been using the mini cyclone since january 2006 and there's almost nothing in the SV canister.  It's been used to vacuum dry-wall dust, wood chips, saw dust, and the floors in the house and outbuilding of general debris.  Here is a shot of the canister and of the filter.  Now, using the mini-cyclone with the Festool CT-22 has been a drastically different: the bag fills up rather quickly because the cyclone only separates roughly a third of the material.  Why?  The SV and the CT-22 have roughly the same specs and the system is the same: I disconnect the hose from the vacuum only.