It sounds like you have the OTO test for chlorine - the good part about it is it's quick and easy so you can do it frequently and the color will get orange as chlorine gets higher, the bad part is the accuracy isn't great. If you can get an FAS-DPD test to supplement your kit, that will give you a better FC and CC reading but that one will bleach out if the chlorine level is too high. The rest of the tests in your kit should be OK.

It looks like Ben sells the FAS-DPD test on the poolsolutions website - PS100r.

Peter