Sounds like a case of too little liquid and too much filter-
You probably have too big of a filter for the amount of liquid (that is too big of a diameter) Any filter will need to first "wet" with the liquid... so that portion will not be released after filtering...
Next time try a smaller diameter filter.. the filtering will go slower (less cross section for it to pass through), but you will get less loss from the "wetting" of the filter