You are correct but I learnt it only after I renewed the passport and was asked to file for Misc. Services. I do have a valid tourist Visa on which I have travelled previously. Hopefully, if my surrender Certificate comes in time and OCI gets granted, I may be able to use that for my trip in July.
I think you complicated the matter. Your Online registration application for OCI that you submitted had Different US passport number and then you renewed your US passport and again logged to Misc. services online Application and sent Application. You could have done that AFTER you got OCI and could have traveled with OCI Visa in Expired US passport and New US passport and OCI Card.
I seems to me that you are US Citizen more than 10 years and may have traveled to India in past with Visa. Do you know if one gets ENTRY VISA(X) need to do the Registration in India with FRRO if stay is less than 180 days?