I'm not sure this qualifies as "shady" when everything is displayed within the same viewport.
At least that's what it was like before; in Australia, the Model 3 configuration screen is apparently now stuck in an infinite redirect loop. It looks like it's unchanged, but I can't look at the page for more than a second.
It seems concerning that outright dishonesty in consumer-facing material for large purchases might reasonably be considered par for the course.
What an abject failure of industry leadership.
Good thing they weren't kind enough to include the amortized battery replacement costs or other differentials in operating costs, like a comparison between their repair and maintenance schedule to an industry average.