Since the car looses some oil when taking hard corners, it is difficult to estimate how much you lost with a POS dipstick.
Ya know I saw a possible solution. I noticed on my friends eagle talon the dip stick could fit in the tube we use on our vehicles. However, the length is off by about 3 inches :( you could probably extend the dipstick with a peice of stainless, and use those aircraft rivits to fasten it all together. Then you can have a traditional flat dipstick that might perform a little more consistant.