You might want to try casting your 8 sts onto a straight needle or your 5th needle, then knit your first round onto your 4 DPN. kfb into 2 sts onto a needle at a time to get 4 sts per needle. 16 sts on 4 DPN the easy way. It's the only way I can ever get this to work.
Thanks guys, I was starting to think that I forgot how to use DPNS But the trouble was just trying to manage those 2 sts each on four DPNS what a pain . I finally gave up and went to Magic Loop . You know I've use dpns many a times but never with so few sts on them.