Grip Digital interview questions

I got inmailed via linkedin and interviewed by one of their recruiters the following day, pre-screening was pretty good although their pay range wasn't great. Only one day after that I got told that the position is being filled internally, which makes the hiring process feel disorganized.

The homework assignment, which they gave me for junior position was too dificult. That assignment was suitable for experienced medior or senior, not for junior, which wants to learn... Seriously if I had that much knowledge, I wouldnt apply on junior position. Another company that expects senior skills, but wants to pay junior salary.