I would try the following:
Register the pack a second time under a different Name: "Distorz2" for example.
Then upload that to the store so we can try.
416s are most often caused by the server and client-systems, not by the file (so it probably isn't something you can easily fix). So maybe a new version will already fix the issue.
EDIT:
There are cases reported that non-english versions of Chrome got 416-errors on certain Servers that were english. So make sure you don't have any non english characters in your filenames.
EDIT 2:
Both are just guesses, because 416-errors are communication Errors between Client and Server. SO don't scream at me, if it doesn't work at all.
BTW: I like your pack, so far.
