I ran a full backup last Friday 2014-06-13. It took over 11 hours and completed successfully the next morning, Saturday 2014-06-14. Nothing else happened over the weekend, and the last job shown in my job log is this successful full backup from Friday.
Here is what the "Last 7 Days of Backup Jobs" graphic shows in the Backup and Restore pane. Note the activity on Saturday and Sunday that doesn't exist (more text below graphic).
When I click on the bogus info for Saturday and Sunday, it actually refers to jobs that executed on Thursday and Friday. In other words, for most of my machines, it is showing a 2-day shifted view of history.
Oddly, there are four machines where it shows the correct history. Two of the machines are Hyper-V hosts and two are Hyper-V clients. I can't figure out why it shows the proper history for these particular machines, but not the rest..
PS - How can I report this bug to Symantec? I am running the trial version so I have no way to use the official Support system.