I'm afraid Watermom is right; something is SERIOUSLY wrong either with what you are adding, or with the way you are testing.

Check the packages: if they say "sodium bicarbonate" or "sodium acid carbonate" or "sodium hydrogen carbonate" as the ingredient AND the material inside was a fine gritty white fast dissolving material . . . you added the right stuff.

If so, toss your kit!

+ Here are links to the kits we recommend:
HTH 6-Way Test Kit @ Walmart
Taylor K2006A (3/4 oz bottles) @ Amazon
Taylor K2006C (2 oz bottles) @ Amazon