Hmmm, I did set it properly (at 1.5) but everytime I reset, and it pulls less, it eventually goes back.
Try setting the bias slider at 0.... See if that solves your problem. Also make sure the counterweight is all the forward toward the arm pivot
I assume you have the TT set-up level. To check place a small level on the platter. Check for level front to back, and side to side.