Tribal Fusion eCpm Rates

Hey Guys,

Wondering if anyone is or has experienced this issue:

I have set my minimum floor filter to $0.6 eCPM however since January 1st the eCPM has been below this everyday - I don’t understand why ads below the threshold being served to the site? As a result, most of my inventory for this month so far has been filled and sold at a lower price than I should have got for it. I have appropriate defaults set up and any unsold inventory should all be directed to them which it was doing before this month.