I had the same situation. I tried to modify in the site. But it's not working. So I send them a request with the details to be modified. They replied me that my request has been accepted and awaiting for the documents. Then I sent my transcripts. I got ECA.
So..
Send them a request thru their contact customer support option. Mention the degrees to be added along with existing order (UG + PG). Then send them the transcripts.
I had the same situation. I tried to modify in the site. But it's not working. So I send them a request with the details to be modified. They replied me that my request has been accepted and awaiting for the documents. Then I sent my transcripts. I got ECA.
So..
Send them a request thru their contact customer support option. Mention the degrees to be added along with existing order (UG + PG). Then send them the transcripts.