Newsletter is sent even it's not been a day since the admin email

Jak vyvolat chybu: Don't publish any articles for a long time, meaning for more days than specified as the newsletter interval. Then publish enough articles.

Chybné chování: The admin email is sent and then also all the emails are sent.

Předpokládané chování: The admin email is sent and all the other emails are always sent not sooner than 1 day since the admin email has been sent.