Exchange Permissions inherited for admin, showing in PS report

I've got a PS report that I run that tells me who has access to mailboxes other than their own. On this report, i have one admin who is showing to have permissions to several mailboxes, yet these do not show in EAC. I have ran the PS command to remove their permissions, but it's still showing on my report.

Here is the PS report I'm pulling: Get-Mailbox | Get-MailboxPermission | where {$_.user.tostring() -ne “NT AUTHORITY\SELF” -and $_.IsInherited -eq $false} | Select Identity,User,@{Name=’Access Rights’;Expression={[string]::join(‘, ‘, $_.AccessRights)}} | Export-Csv

Any ideas?