9650SE raid controller Drive jumped out of raid

I have been working with Hardware for a long time but this one has me stumped. I have a 9650SE-16ML raid controller. I've configured it to raid 6 with 14 3TB drives. Working fine and loaded the LSI communications and enabled the WEB management, so I can start getting raid health. Worked fine for several months and just noticed a degraded array. One of the drives just died. Powered down, replaced the defective drive, come back up, and it's rebuilding the array just fine. But here's the thing, One drive is now part of a second unit! Not the drive that was replaced, but an entirely different drive. It's part of a non-existent Unit 1 and everything is reporting OK. Also, my raid size has reduced. I'm stumped as to what did this and how to put the drive back into the array without an entire rebuild. This is Ubuntu Server 20.04. Controller is
LSI 3DM2 9650SE-16ML 3DM2 version 2.11.00.021
API version 2.08.00.027
Copyright (c) 2012 LSI Corporation

From the web interface:
Drive Information (Controller ID 1)
VPort Model Capacity Type Phy Slot Unit Status Identify
0 ST3000DM001-1CH166 2.73 TB SATA 0 -- 0 OK
1 ST3000DM001-1CH166 2.73 TB SATA 1 -- 0 OK
2 ST3000DM001-1CH166 2.73 TB SATA 2 -- 0 OK
3 ST3000DM001-1E6166 2.73 TB SATA 3 -- 0 OK
4 ST3000DM001-1CH166 2.73 TB SATA 4 -- 0 OK
5 ST3000DM001-1CH166 2.73 TB SATA 5 -- 0 OK
6 ST3000DM001-9YN166 2.73 TB SATA 6 -- 0 OK
7 ST3000DM001-1CH166 2.73 TB SATA 7 -- 0 OK
8 ST3000DM001-1ER166 2.73 TB SATA 8 -- 0 OK
9 ST3000DM001-1CH166 2.73 TB SATA 9 -- 0 OK
10 ST3000DM001-1CH166 2.73 TB SATA 10 -- 0 OK
11 ST3000DM001-1CH166 2.73 TB SATA 11 -- 1 OK
12 ST3000DM001-1CH166 2.73 TB SATA 12 -- 0 OK
13 ST3000DM001-1ER166 2.73 TB SATA 13 -- 0 OK

Any Suggestions? I'm thinking if I replace drive 11 it might re-join?

Also, everything is just fine, great performance, just stuck in a degraded status