I ran a query in Acoustic for New donors (status code 10) and a quick search revealed that there were donors pulled in the query that had a first_donation_date before the fiscal year FY2324, which shouldn't be possible based on the definition.
Definitions here: https://civicrm.wikimedia.org/civicrm/wmf-segment
When looking closer, the pattern is that the ones I found were duplicates in Civi that haven't been merged yet. However, the volume is enough to where I don't feel comfortable using the framework alone to email people; there would be people getting emails that aren't eligible.
My guess is that the reason this is happening is because Civi has the segmentation framework keyed to CID and Acoustic is keyed for Email Address. (and Eileen just confirmed and agreed in Slack).
Can we find a solution fairly quickly on this? We're starting to implement the framework codes more regularly so I think this should be flagged high priority. Thanks