My Linux Script Output in Alarm List ?

I execute any shell script in Linux servers snmpd.conf with NET-SNMP .

##
# Extensible sections.
exec .1.3.6.1.4.1.2021.50 ntp /home/admin/kbmon-client/kbsn-ntp-linux.sh
exec .1.3.6.1.4.1.2021.51 swap /home/admin/kbmon-client/kbsn-swap-linux.sh
exec .1.3.6.1.4.1.2021.52 restart /home/admin/kbmon-client/kbsn-restart-linux.sh
exec .1.3.6.1.4.1.2021.53 runlevel /home/admin/kbmon-client/kbsn-runlevel-linux.sh
exec .1.3.6.1.4.1.2021.54 hwclock /home/admin/kbmon-client/kbsn-hwclock-linux.sh
exec .1.3.6.1.4.1.2021.55 raid /home/admin/kbmon-client/kbsn-raid-linux.sh
exec .1.3.6.1.4.1.2021.56 cron /home/admin/kbmon-client/kbsn-cron-linux.sh
exec .1.3.6.1.4.1.2021.59 test1 /tmp/test1.sh
###

this scripts output is one string text.
I created new Bulk monitors with OID code and set Threshold Alert whit is string in to OPManager software .
Always test this monitors from Performance Monitor , output is ok and show me this strings.

opmanager shall always show those Alarms . why OpManager any time show this Alarm ???

and when Clear this Alarm any time do not create this alarm again ???

while i delete this server from opmanager and again add this device, show this alarm ???

where is problem please help me ???