What have you tested besides Alk and Calcium??
When you say funny..... like what?
What I've noticed if I have any issues with alk, one or two of my Acropora sp species skin tends to look a little raised, rough or bumpy like, instead of smooth.
As far as Nitrate(NO3) test kits, I have two types and hardly ever test for nitrates.. maybe once every 3 months or so.
The Salifert and the Red Sea Nitrate test kits I find are both pretty accurate to one another. They always gave me the same readings when I compared the color samples to one another. So you may want to look into either.
The Salifert one comes with two bottles of powder formula with measuring spoon.
The Red Sea comes with 3 bottles of liquid formula.
GL