Your image links are broken. No pictures are displayed.
Let's take this one step at a time. Let's ignore everything but the cut wires for the time being and troubleshoot:
Critical to resolution: Is there a one inch cut in your Honda pack like this:
If this wire is intact, it is the cause of your P1600, which is a generic IMA fault that often accompanies other IMA faults. The solution is to install a 20 Ohm resistor between the red wire and the blue/yellow wire.
The voltage disparities are not a concern given the following:
1) After installing your original IMA pack, it was operating normally and received a charge, and these measurements were made AFTER you observed charging.
2) Your "new" pack has not charged for any significant period since installed, and it may have been sitting around for some time before you received it.
While the cut wire may appear horribly shoddy, it is likely a non-issue. Please correct the pictures, and I will check my harness when I get home.
Steve