Accessibility focus order in question types

Hi all,

Has anyone else noticed that the pick 1 and pick many questions behave differently when using the keyboard to navigate through. 

With pick 1 you tab to the first possible answer and then use the arrow keys to select your answer and then tab to the submit button. 

Pick many works differently as you tab to each potential answer and use the spacebar to select your answers, then down through to the submit.

Here's an example. Both work fine but shouldn't there be a standard approach to better aid accessibility, or do all the keyboard users know and accept the differences. 

Seems a bit confusing to me.

Chris