Kirk asked the teams their strategy immediately before starting the run. The actual temple layout and temple guard placements had already been set by the time Kirk asked the team what they were hoping to do.
One prime example is the guard in the Cave of Sighs: during the prize sequence, they would often edit in shots of the temple in between each prize. In many cases, a guard can be seen squatting in the bottom of the Cave of Sighs. Regardless of whether a team's strategy was to begin high or low, they would not move the Cave of Sighs guard (i.e. if the team said they would begin upstairs, they would not move the Cave of Sighs guard seen during the prize sequence upstairs also).