Steve,
he had metered and verified rotation, had indeed swapped phases
A phase rotation check will never determine a "rolled" primary. All a rotation check does is look at combinations like X1->X2->X3 or H1->H3->H2 it never determines which conductor is actually A phase. The only way to determine a rolled primary is to physically trace it out or to connect it up and compare the ouput voltages to a known source.
I have a location with six transformer all verified (using a TTR) as Dyn01 conncted units. But after they were installed and phase rotation was corrected, voltage measurements discovered a rolled primary on two of the units.
