Push button start towables not sure it applies to all !!

also not to sidetrack the thread but since we are on the topic of push buttonstarts--my 2010 Toyota Avalon with push button start refuses to turn over when the front wheels are up on the tow dolly. The tech told me this was because the front end was higher than the rear. Don't make sense since you can park on a steep incline and it still starts any thoughts from you engineers?? tom