P3.1 to P6.3 - Errors with calanders and dates

All,
I have a 3,000 line schedule that was created tweaked, and leveled in P3.1. We have imported it into a clean install of P6.3.

The duration units in P3.1 were in hours, and now in P6 they are in days. In the P6.3 plan, the dates seem to be pretty consistent with the dates from P3.1, but the durations are the problem.

Not only did the durations convert from hours to days, they also multiplied by a third [(1/3)or(33%)]. So an activity that was showing in P3.1 is supposed to take 7 24 hour shifts to complete (7 days on a 24 hour calander) is showing up at 21 "Original Duration" UNITS in p6.3.
So for an activity in P6.3 under the "Original Duration" column it shows 21, but the start and finish dates are only 7 days long. I also checked to make sure on the activities that I am using the imported 24/7 calander from P3.1 in P6.3.

So I guess after all that, my question is: How do I change the way the units are defined for original duration? or should I just run a global change and divide all the original duration units by 3? (I assume if I did the later though, that it would change the start and finish dates to be 1/3 the time.)

Any help would be appreciated,
Thanks
Teague