Users are being unsilenced before their silence time end

[Phrosfire]

Describe the bug

Some users who are silenced are having their silence ending early. From the code, I can see that the silence is setting banEnd, but it's still ending before that date is met.

To Reproduce
Steps to reproduce the behavior:

1. Silence a user for several days
2. User is unsilenced at daily reset

Expected behavior

User stays silenced until the endDate is met.

[nanubula]

Are userReports ever cleaned up once the ban/silence ends? I could see if someone has multiple userReports and one silence has already ended, maybe that old report is unsilencing the user here.
If userReports aren't cleaned up to keep a history, maybe there should be another banState for reports that are no longer valid and can be ignored when checking expiredReports daily. I could be totally wrong on cause though, just my first thoughts