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