I think you are confusing the AcuraLink messages with the Maintenance Minder. It sounds like you found the AcuraLink message about the A12 being overdue and you deleted it. Think of AcuraLink messages as emails.
Now you are still noticing the oil life showing up as 80% on the maintenance minder. You should be able to reset the maintenance minder from the scroll wheel on your steering wheel. I donít recall the steps to do so, but it is in the ownerís manual as well as on a post on this site if Iím not mistaken.
2015 TLX 2.4 Tech - Graphite Luster Metallic w/Ebony