If you call metrics separately, such as the example with Domain Authority and Page Authority, then it would return separate rows.
It's best to add Cols values to request all URL metrics in a single row.
So 34359738368 + 68719476736 = 103079215104 so Cols=103079215104 would return both PA and DA in a single call, returning just one row of data. After that you can just keep adding more to the number to include more metrics.
I hope this helps! Let me know if you have any other questions or if there's anything that needs clarifying!