Still plan on breeding in a month?
Anyhow, if you'd have read the instructions that came with the kit, you'd know how to read your pH. You use the "regular" pH test kit first. If your pH isn't at the high end of the range, then don't worry about the high range test. However, if your "regular" test shows up at the high end of the chart, then you need to use the high range test. The "regular" test can only measure so much alkalinity before it stops working, hence the high range test kit.
Also, are you sure your tank has cycled? If you're still getting ammonia readings, I'm a bit skeptical. When did you start the cycle, and what have you done to get it going?