Need a second opinion (P0A80 but still Ready)

Back story, scroll down for problem
Almost 1 year later, and I have replaced a total of 9 modules in this car. God I wish I could just buy a reconditioned pack and be over with it for a few more years. But it seems this car only wants to give me trouble at the worst possible times. Story time over.

So recently I had a voltage leak from a module. Nothing new, to me. I replaced the faulty module and done. During reassembly however, a nut was on the terminal wrong and I didnt realize it in enough time and tightened it. Terminal broke off. So me being the brainless blonde I am, decided to try and put the nut back on the stub of a post after managing to find a replacement nut. Car started fine and there were no error codes so I put it in D and presed the gas pedal and that's when I heard a loud buzzing noise then a small pop. The module with a busted up terminal was the one on the end away from the ECU, number 28. The sense wire for it exploded. After another module terminal busted, I replaced all faulty modules and soldered the sense wire back onto the plate to the best of my ability (which was not best but it did the job, I think). I replaced the stripped nuts with stainless steel ones of equal size.

Problem begins here
So now my problem is this. The car wil go into Ready mode, but P0A80 is pending for about mile driving, then the triangle of death comes on and tells me that Battery Block 11/12/14 (it varies) becomes weak. I keep a close eye on the voltages using the Torque app and I notice that, even sitting idle with no lights on and the AC off, the battery drains fast. It charges just fine though. But what is really peculiar to me is that the voltages for each block will jump from 18v to 16v suddenly, then slowly creep back up. All of the blocks are relatvely the same volts however. Also, as I was replacing the modules I continuously checked their volts to make sure they all stayed the same (7.97v). None of the modules never dropped. I am guessing here that the sense wire is at fault here and that I did a shoddy soldering job on it but I do not know. Even with the Triangle of Death on, the car will STILL go into Ready mode. I have never seen this before since I always thought P0A80 was the death code that prevented startup but no, my car goes into Ready mode even with it on. However, with the code on the car does not charge the battery and does not run very well, but clearing the code the car returns to normal. I know this is not safe so I'm not treating that as a solution.
Any help is appreciated. Also, a link to a reliable bus bar replacement that isn't going to cost me an arm and a leg would also help, as I have come up empty handed with out of stock or bad reputation.


Screenshots of my blocks below