liquid chlorine raising pH

[SalvationArmy]

I have read on other threads that NaCLO does not ultimately change the pH. With my 100k indoor 86 degree CL pool, whenever I add CL (12.5 %) I have to add about the same amount of HCL to maintain a pH between 7.2 and 7.6 I am wondering if this might be due to a high lye content in the liquid bleach.

Thanks for your thoughts,
Mike