Sounds like a good amount. Add it tonight after the sun is off the pool. Then, test it again early tomorrow morning before the sun really gets on the pool and see how much cl you are losing overnight. If you are losing more than 1ppm, do it again. Try and test/redose at least twice (and more than that is even better) per day until you don't lose more than 1ppm overnight.

Trust the kit over the strips. I think the 5-way kit tests TC. I haven't used one in a long time. Check the instructions.