The motor was not turning fast enough and had very little force which resulted in the cogs jamming and showing the wrong position. This was fixed when i found this link (http://arduino-info.wikispaces.com/SmallSteppers). On this page i found that my wiring was wrong. If you're using e.g. pin 8, 9, 10, and 11 you must wire them like 8, 10, 9, 11.

after that this was the result no more jamming...