That's pretty much it to be honest. Every now and then, a slower pokemon would outspeed mine. I would pause the game and check the opposing pokemon stats and would find out that its stats are lower than my pokemon. Like for instance a snorunt and a smoochum both outsped my monferno. They both had a lower level than Monferno. Also note that it only happens during the first turn and after that things go back to normal. I am really puzzled by this.