Post Battery Refurbish Issues

Okay, so i could really use some help from you experts with finishing my hybrid battery pack repair. I made a few posts on this forum previously in ignorance that were poorly informed and i have since done a lot more research and a lot more work.

The Story: I am repairing the family 2005 Prius that has been sitting unused for a few years. I jumped the car and it fired up and surprisingly didn't have a red triangle of death. I did some repairs to the brakes and suspension and drove it around for a few weeks before the red triangle came up. I tired to use Dr. Prius to do a battery scan but it told me the battery was too cold to test and so i decided to just remove the whole pack and try and test modules. Eventually i ended up getting battery chargers that could do charge and discharge cycles and i cycled every module until they had 4500 Ah discharge capacity or better. Those that didn't I replaced with good used cells from eBay which i tested the same. I then balanced all the cells by connecting all the positive sides together and all the negative sides together for 24hrs.

Now i have reinstalled the pack back in the car and it looks healthy on the battery monitor on Dr. Prius, but I still have the same Warning! Battery too cold to continue the test (77F) error preventing me from doing a full battery test. The red triangle also came on when i was briefly riding on the freeway with code P3000 which i cleared with Dr. Prius hoping that it was just due to the battery's needing to cycle or charge together as a unit. It didn't come back on in the next 15 mins of the drive though i didn't drive any further.

Can anyone help me understand what might be my issue with the cold battery thing. Its not crazy cold outside and 78-83 degrees F on the monitor seems like a range that it would be able to test at. I also noticed under a harsh braking that the pack voltage went red (271.16 Volts) due to the regenerative braking. Is that an issue? Is there supposed to be something limiting that. As soon as i eased off the brake that number when down lower...

I also attached a PDF of the discharge/charge cycling of the batteries if that helps at all.