lol, yeah dude, Chankast is liek waaay outdated and other emulators have surpassed it in performance and compatibility and such.
You may like using 5+ year old emulators with crap compatibility and performance, but we like using the latest, greatest, and best which is not Chankast as of current.
Give NullDC, Demul, or even Makaron a try for best results. I'm sure you'll find that they'll solve most if not all of the issues you are experiencing with Chankast.
While not officially announced as a dead project, Chankast can be presumed dead as it has not received any further releases. There also hasn't been any news or updates regarding development for the past five or so years now