Maybe it's something easy so adding to 2.12 - also I notice the column Alert condition is empty which maybe is a bug too?

I looked into it re the empty column. Alert condition is not really a bug as there is no dimension for VisitsSummary etc. In other reports there would be maybe PageURL contains '/index'. Maybe we could use a default message in this case.

@gaumondp you say you have set up a cronjob, but do you have disabled the browser based archiving?

Désolé @mnapoli for the delay, I was on vacation...

Trigger from the browser is set to "No". And "Reports for today" is at 600 seconds.

@gaumondp I can't reproduce it locally, even with non-english settings.

Just to be sure: are you sure you have only one alert created, that this alert is configured to only send to one user (there's no way that it could be configured to send it twice to you for some reason), etc..

Also in your cron you are only running core:archive right? (i.e. not running core:run-scheduled-tasks separately?)

I can't find any reason for the bug, I think the next step would be to try to debug on your install. First could you check that there is nothing wrong in the alert (or piwik_alert) table (e.g. duplicated alert)? If all of what I've mentioned seems right, then maybe you could send us some credentials to access your Piwik install to debug?

@mnapoli , I'm still on 2.11b3 and I didn't get double Alerts since March 5 even if I did receive many Alerts since then. My Alert is sent when there's more than 200 actions by a single visitor like the screenshot.

I only have a single cron command with core:archive.

And it will never be possible to get credentials here but since I'm alone with this and I can live with few double-emails a month, don't spend too much time on this.

And about tables, piwik_alert has only 2 records, both created by me as a Super User.

Here is latest history with 2 alerts sent: