Weird Salt Reading in a Non-SWG with salt

The pool is 9000 gal gunite in Hawaii, at an elevation of 1000ft so nowhere near the ocean. The salt measured 400 ppm before putting in additional salt to raise it to it to 1400 ppm using Ben's calculator. Now several weeks later a Taylor Saltwater kit is showing 3000 ppm (15 drops)? But TDS is registering 1800 ppm when it was 560 ppm before. This is weird!

The water feels great, no stinging of eyes, and virtually no salty taste.

But where did this additional salt come from or is the reading or kit bad? Is it bad for the pool to be at 3000ppm?

Use Wal-Mart's liquid bleach, muriatic acid, baking soda, the blue stuff, and Algaecide 60. Have always had an iron problem from flying red-dirt (ferric oxide AKA rust) but this is under control.

Temp 80 F
pH 7.4
Alk 100
Cl 6.0
Hardness 375
CYA 50
Salt 3000?
TDS 1800
Pool Crystal Clear

Help!

Is it possible that the extra salt is coming from the bleach? That will increase the salt level, but I don't know how quickly. In any case 3000ppm is a common salinity for chlorine salt water generators and will not hurt anything.

Yes, I am aware of that fact this is the reason for the post. I apologise I should have made that clearer. I will call Taylor on Monday. It is possible that the TDS meter is off.

One further thought, is there a way I could add a given amount of salt to a given amount of tap water (60-80 ppm according to the local water board) to test the Taylor kit. If so what would be the amounts? Right now the Taylor kit says the local water is between 200 to 400 ppm!

Thank you for your help.