These are not bugs and i will try to explain:
the percentage solved depends on the score on hackquest.
Since every hackquest challenge scores differently, you might get more % of the score with less challenges.
The reason because alt3rn4tiv3 has so low hackquest score is the following:
Your best site (the site where you get most points) is added twice for your totalscore.
You might want to read our
scoring faq which comes with a short example.
Happy Challenging
Gizmore