Converting ATP from OCPU to new ECPU metric defaults to higher ECPU number

Summary:

Converting ATP from OCPU to new ECPU metric defaults to higher ECPU number

Content (please ensure you mask any confidential information):

ATP database from 2 OCPUs to the new ECPU metric, but when I click the link to Update to ECPU model it defaults to 8 ECPU count Read-only and I can't change it.  It says I can scale my compute post update, but why does it automatically increase the ECPU to 8 when it was originally set to 2 OCPUs? Now I have to go back post update and scale down to 2 ECPU and I find that incovenient when I'm expecting it to default to 2 ECPUs. Please explain. Thank you!