I have a fresh install of Piwik 2.1 on a VPS with VPS date and time set to my local UTC+12 for New Zealand. I have cron archive setup and working and daily reports. Most days the report is sent at 2AM, the time set in Piwik.
However after a week of 2AM emails one came in today at 10:27AM and another daily report has not turned up yet. The send happens through my Gmail account and is being sent to a gmail account.
Has anyone else come across this?