הגיבויים נשלחים ל-S3, אך עדיין נשמרים כמה גיבויים מקומיים אקראיים

[omarfilip]

Try changing your backup time.

Local backups not deleted after they are uploaded to Amazon S3

Sixteen days later, it seems like this was the solution—no more undeleted backups. I don’t know what was causing the conflict, but it’s moot now.