I am having a similar issue, except very low Ca and high Alk. I had been dosing Kent's Liquid Calcium, but have seen only a minimal increase over the past month with no effect on Alk. I read one of the post in this thread and your article referenced my problem and now see that the recommended dose by Kent will not have much effect. I went to the calculator and dosed 1/3rd the recommend amount and will test tomorrow.
My problem was caused by advice by the LFS when I started 9 months ago who told me to add Pro dKh buffer every time I added water. BTW, they failed to mention you should test for Ca and Alk, this was the prescibed formula for pH stablization. Well, I came across an article of yours late December and got some test kits, and low and behold, I had a problem. Unfortunately I did not read the rest of your articles and have been combating this slowly without much progress over the past month. After I get the Ca boosted I will be looking into your two part system or B-Ionic inorder to maintain the balance. Thanks, so much for the info, I hope to see some movement tomorrow.