I guess I should've updated this post a while ago.
Don't hold your breath for their customer service. I had spoken them a couple of times trying to get my issue resolved and their response / turnaround time was horrible. The lady I had spoken to was very nice but not very helpful nor was she able to get answers quickly. First they sent me recalibration instructions which I thought seemed a little to involved for me to do on my own. When I told them I was not comfortable doing it, the went ahead and sent me a new display unit (which also technically challenging to install, but not nearly as complicated as the original recalibration instructions). After swapping out the displays, I didn't find that the problem was improved signifcantly. Based on my own independent testing (using strips as well as taking a sample to local store), I keep finding that the unit reads a little high. I've decided that as long as the unit does what it's supposed to do as far as chlorinating the water, I can deal with the inaccurate salt reading. I will just make sure to test it periodically and add salt whenever I deem it necessary based on my own testing.