As a term has one prefLabel, one scopeNote and multiple altLabels, the result now has rows filled with this altLabel, but other columns are empty.
I’m trying to determine if my expectations are wrong (I expected all altLabels in one cell, or all rows having cells with data?), OpenRefine is doing something wrong or the reconciliation service (specifically the data extension) needs tweaking (do the combining, or provide all data in each row?).
Please note that the results of a reconciliation request may also contain links to other entities.
OpenRefine will display the linked entities as “Reconciled values”, where you can further expand your data.
If OpenRefine would join the multi valued responses together in one field, this information would get lost.
So I think it is a sensible default, to use the records mode in OpenRefine to handle multi-values responses.