In events list (and it is reflected also triggers list) I have many non-true alerts.
See screenshot for example.
The template is built this way:

• SNMPv3 to gather data (authenticated)
• first trigger uses "delta(#2)#0" to verify if there was a change in last 2 gathered values
• second trigger uses "min(90)>75"

CPU is always 1-2% in use (as from Zabbix simple graph), and admin status is always the same (value is "2")

Similar frequency of events keeps all the day.