Why do my alerts keep firing since upgrading to version 9

Hi, one thing I have noticed since upgrading from v8 to v9 is my converted alerts many keep ‘firing’ when they shouldn’t.

For example I have an alert where if a metric goes below 1000 then alert us via email once and then if it goes over 1000 then it’s OK or Resolved.

Well I have a few servers where this value is below 1000 and will be for a few days due to what the servers do, but I get emailed about this firing alert every few hours and I can figure out why it has to keep telling us when we just want the 1 alert/email.

How can I fix this or where would I look?