Board Thread:Questions and Answers/@comment-182.53.26.122-20150326131404/@comment-26019974-20150327053410

I don't know if it's the same in Touken or not, but DMM has no control on the games they host whatsoever aside from providing API links so they embed them onto the site.

Everything regarding the game is by N+, and if the devs say it's fine to refresh it's fine.

I haven't seen anything about multiple tabs (Why would you do that anyway?) but the game might bug out since it's processing two things at the same time, and like Panda said the damage in PvP is considered the same as Sortie damage.

As of now, the only thing you should worry about is if you play on mobile or have multiple accounts, since that actually can get you banned.