MacBook Pro Retina 15" (Mid-2015) New battery has weird metering
It seems you have already tried all the things that can be recommended in your case. I would assume your battery is faulty.

For anyone else with this model reading the thread: if you do have a Mid 2015 MacBook Pro your battery might be eligible for free replacement unter a quality program: https://support.apple.com/15-inch-macbook-pro-battery-recall

You could check for the QP as well Vaultnaemsae, but chances are Apple is going to decline coverage as you already performed unauthorized service on the machine (and your Apple battery is no longer a threat as you took it out, which would be the whole point of Apple replacing it free of charge.)