It only takes 6 lbs/cu.ft. to get 20,000 grains of total softening, so unless your water is extremely expensive it's generally more cost-effective to use minimal salting. Besides, your meter is set to the longest range at minimal salt usage, so you're definitely wasting salt.
I'd move it down to 4 pin gap on refill and bring it down to 2000 per regen, and try to test the water a few times right before it regenerates to make sure it's staying soft. It won't hurt if you test at a grain or two right at end of range.