Good luck with the D. affinis. This is an upright form, not a rosetted sundew, so if your plants are "wheel like" they aren't the correct species.
D. venusta shows it's semi-upright form early on as well, so if the leaves are paddle shaped and low lying, it is not D. venusta.
My real question now lies with my D. communis, which is a rosetted plant. To my eye is looks very like D. spatulata, but I have been strongly assured that it is not.
I have my fingers crossed!