Argh.
Was dealing with two Discourse forums with similar IPs. Updating the time on one and checking the backups on the other. Looks like both are working now! Huzzah 
AWS has an issue once the server falls out of sync by 5 minutes or more:
Fix for Ubuntu was to reset the clock.
$ date
Thu Feb 14 05:32:16 EST 2019
$ ntpdate ntp.ubuntu.com
14 Feb 05:26:58 ntpdate[12447]: step time server 91.189.91.157 offset -408.660323 sec
$ date
Thu Feb 14 05:27:02 EST 2019