I just became purple and unlocked the uphack funtion. But I can only hack the contest codes but not the practice codes, for example, 83545291. However, in the Mike's blog, it mentioned something about hacking practice codes. I wonder if my rating is not high enough to unlock all 'uphack' function.

What's more, when I enable the coach mode and explore the contest in gym, my gym page will not show Solved: x out of y and I can't find my code in my submission history, even if I have submitted some solutions before. Is this normal?

Thanks in advance.