Struggling with Mixpanel Alerts? Seeking Help for Anomaly Detection Issues

Hi everyone - I'm having a HUGE problem with Alerts and am hoping another Mixpanel user has advice. I've been going 'round and 'round with Support over email for weeks trying to get to the bottom of it and so far, I feel no closer to a resolution. I'm trying to do something which feels simple - fire an alert when Pageviews for a given hostname increases/decrease 75% yesterday compared to a week ago. The intent of the alert is to flag us when major anomalies happen - it shouldn't go off very often. I've followed support's instructions for this use case but I'm getting daily emails for the 75% increase alert on every one of my hostnames. I think its alerting based off the actual value increase being over 75 instead of the percent change.