My bad, I didn't notice the link at the very bottom of the sidebar. It doesn't seem like there's explicit mention of Asian Handicap rules so imo if support told Bitcoinsummoner one thing that wasn't described elsewhere, it's probably the fault of support.
To be honest Bitsler have an "ok" support team, but there are lots of room for improvement. Based on my past inquiries with live support, I would recommend Thomas as he seem to be the best or one of the best in that department.
@Bitcoinsummoner
I guess it would be best to ask Gab? Sorry, I'm not even familiar with the asian-handicap ; as a matter of fact, I thought this is crazy racist term for paralympics held in Asia. lol
Regardless, if support is misleading players (even unintentionally), and stating rules not mentioned elsewhere that have a significant effect on the actual bet, I feel like that's on Bitsler. Generally you'd expect customer support to provide accurate information.
How live Asian Handicaps work on a lot of sportsbooks (and what support supposedly told Bitcoinsummoner) is that they ignore the current score, so if the score was 2-1, and a -0.5 asian handicap was offered on the home team, it's is a "real" -1.5 handicap since the handicap would be relative to the initial score of 2-1.