Hi Kasey,
I’m very sorry, for some reason this post of yours only popped up for approval just now – even though it is a month old by now. We have had some problems with this forum software. We are looking into alternatives. Sorry again.
Re your question: In AP we have a very special line engine. One of the features is that it has a subtle but effective line stabilization, that is smoothing out little jitters from your pen and makes it easier to draw nice circles and curves. Despite of this smoothing effect it can still make sharp corners etc. What you found is the one negative effect that can arise, exactly when you draw VERY fast with sharp corners. Luckily you would normally not encounter this issue, but you do, so I’d better take a closer look and see if we can improve our engine. Thanks for bringing it up!
Best,
Niels