Depending on accuracy rating of your clubs there is a circle of accuracy(Search VEM) for clubs, a ding can be long/short/R/L but within the circle around your point of aim...
Lot of threads on it....1 is a recent topic on crosswind opened by alex on like page 7-8
here ya go.... http://www.wgt.com/forums/t/237339.aspx?PageIndex=8
Looks you have only been on the back tees a month-...your noticing it more because you have longer approach shots now and they say, no one really knows is my guess, but the VEM is cranked up as you tier up...