The past handful of women I've approached and setup a date with always cancels on the first date. Most of which the excuses are comical but I digress. I'm usually able to sleep with them by the 2nd or 3rd tops.

Is this common or a flaw in my game I need to ID?

While on the subject, does replying with an 'ok' suffice when they say 'something came up'? I use this to gauge if they're truly interested in which they'd start the chase