Hi, I'm 18 I go to high school and college and run Summit Grounds Keeping. We run with Great Dane 48" w/bs and comm. Ariens 21". Um... I know exactly what your talking about except, I don't always have to keep going over things unless the grass is a foot tall and soaking wet. If it clumps that bad... cut more often, or get rid of your Encore (they suck... POS). I love doing what I do... and it's probably more than you, so hang in there b/c summer is cake.
Need more advise... get a helper and buy another mower
Summit Grounds Keeping
The sun is shining, the birds are singing, the grass is green...
looks like it's time to go to work and cut down a little mother nature.