I am confused...it has been said as fact that the Key deer came to there current location during the last Ice age on a land bridge. However, as far as I can see that Ice age never got close to the keys?

During the last ice age, sea level was much lower than it is today and the Florida Keys were connected to the mainland US by land that is currently underwater. Deer migrated using that exposed land, which was later flooded and separated from the mainland when the glaciers melted. Over thousands of years of isolation, the deer that inhabited the Keys adapted to the environment and evolved as a distinct subspecies of the white-tailed deer.

These questions are answered by the Google Community. I would direct that type of question to the actual refugee center.