DIY Lithium Battery Balancer and monitoring (BMS)

Hello all. Thanks for all your time and energy into this project. I am having an issue with v3.
Modules disappear when I try to provision a second module. First module is fine. My understanding is to leave the first one connected, then connect the second one to the first one and provision again. When I do this, the module acts like it has been provisioned, but the web reference doesn’t show the second mod or the first. When I disconnect the second, the first reappears.
My cable is + to +, sda to sda, etc. Am I dealing with two modules with the same id?
If so, what’s the fix? I will search through the previous posts for something.