As someone who does some work in Photoshop and Illustrator, I've seen this before.
Both those have tools to help "automate" a re-drawing process, however, when the detail is relatively small, their software has problems with extrapolation, thus things just become merged together.
I've created many translites from original BG, and at first I used those "automated" tools, now, almost every line is re-drawn by hand.
Is it much more time consuming, you bet your arse, but opposed to the results posted by the OP here, the results are worth it - IMO.

So, my two cents, it looks as if this product was rushed through the digitization process.