Penguin,
Not only were the original greens at Banff rebuilt, the new ones are built ON TOP of the old ones. So, elevations are different as well.
True story. I don't know all of the details, but understand Parks Canada (and/or another authority) had a problem with disturbing and removing "contaminated" material from the old greens within the National Park. So, again, the new greens are built on top of the old ones.
This greens reconstruction and the change of hole sequence is a relatively unfortunate circumstance, at Banff.