Why am I getting two messages instead of one

When you are using graphs, you always get two messages: one with text and next with graph. Reasons:

• you can get multiple graphs after one text message (in the future, it is not done yet)
• when you get notification to mobile device you see only "Zabbix sent you a photo" instead of problem's text
• messages are allowed to format and modify, photos are not

For those who think that there are too much notifications: there are not. Because graphs are sending with disable_notification = True. This means that you won't be notified after the first message with text.