How much CYA did you put in the sock? And, on the Borax, did you put in 30 oz. or a cup?

Adding 2 cups (16oz.) of bleach will only add a little less than 2ppm of chlorine. (Each cup will add approximately 0.8ppm -- a little under 1ppm.) That is not enough and will be gone fast. Test your chlorine level morning and evening and each time, add enough bleach to get the chlorine level back up to 6. After about 3 or 4 days, you should be able to go to just testing in the evenings only and then also you'll want to add however much bleach you need to get back to 6ppm of chlorine.

Wait about 4 days before doing the CYA test. Don't worry about the alk right now.