Has anyone else had any issues with the depth reading when pinpointing with the T2. I dug quite a few wheats last night at 4-5" and the T2 kept telling me 8-9". I took my time and made sure I was pinpointing them correctly. I usually subtract about 2 inches from what the machine is telling me, but 4-5" off in depth seemed like a lot. This pinpointing depth feature was one reason I bought the T2. I hunt a lot of parks, where the old stuff is deep so I usually don't bother digging the shallow targets. Any suggestions?