Two update scripts running at the same time on System Admin module?

My phones weren’t working this morning so I checked the system. I noticed the system did an update:

2016-02-09 02:55:06: () Update sequence initialized
2016-02-09 02:55:06: (6.12.65-27) Requesting updates
2016-02-09 02:55:08: (6.12.65-27) Processing update
2016-02-09 02:55:08: (10.13.66-8) Starting stage 1
2016-02-09 02:59:51: (10.13.66-8) Stage 1 complete
2016-02-09 02:59:51: (10.13.66-8) Starting stage 2
2016-02-09 03:04:22: (10.13.66-8) Stage 2 complete
2016-02-09 03:04:22: (10.13.66-8) Starting stage 3
2016-02-09 03:04:22: (10.13.66-8) Stage 3 complete
2016-02-09 03:04:22: (10.13.66-8) Starting stage 4
2016-02-09 03:04:22: (10.13.66-8) Stage 4 complete
2016-02-09 03:04:22: (10.13.66-8) Starting stage 5
2016-02-09 03:04:22: (10.13.66-8) Stage 5 complete
2016-02-09 03:04:22: (10.13.66-8) Starting stage 6
2016-02-09 03:04:22: (10.13.66-8) Stage 6 complete
2016-02-09 03:04:22: (10.13.66-8) Upgrade script complete
2016-02-09 03:04:23: (6.12.65-27) Upgrade process successfully completed!

Why is the system running 6.12.65-27 update script as well? I’ve been on the 10 branch for a long long time.