a. The sport rules can be located here: https://www.bitsler.com/en/sports/rules.
b. Just like pre-match bets and bets on Asian totals all goals count for bets on Asian Handicaps. This is industry standard.
For an industry standard, you'd expect major books like bet365, Pinnacle, SBObet to use said standard. They don't. (it does vary by book, but it's definitely wrong to call it industry standard).
Anyway, the issue here isn't whether it's industry standard or not; Bitsler is free to have whatever option they want. The issue here is that Bitsler's support lied to Bitcoinsummoner, presumably causing him to lose money.
One could argue that support and bitcoinsummoner may have had a conversation which unfortunately had some language gap(some of the former support representative, in my opinion, is kind of a challenge to deal with). I personally have given them feedback, which I did not to ridicule but to let them know they have done quite a poor customer assistance. From my observation, these last 2 instances that I have contacted support, I think Bitsler have changed their customer representatives. Not that it will do any good for Bitcoinsummoner's experience, but for the better future player experience in Bitsler.
This is just my spammy opinion.