For those of us using Liquid Chlorine, you will see a rise in salt ppm over time because salt is one of the ingredients in LC. For reference adding 3 ppm of FC adds 5 ppm of salt. I read on another post that if salt exceeds 4000ppm that it is probably best to drain some water. Also for reference, most SWCG's operate in the 3300-4000ppm range so that may be the reason that salt above that should be lowered by draining. Furthermore, I read that a human can taste salt at >4000ppm so again that may be the reason to hold below that level. In addition to draining you also have splash out and rain that helps to keep the salt levels in check. Yours appears reasonable as does your other test results. With regard to CYA, the use of test strips are very inconsistent thus best to rely on the test you did with the K2006 kit. You can always do it again tomorrow after the pool has circulated some more.