Development User Count Not Increasing

We have used atleast 5 different dropbox accounts to choose images with our integration, but in the Development Console of our application the "Development User" section still displays "0 / 500".

We have added all of our domains in the "Chooser / Saver / Embedder domains" section.

We can even see metrics in the Analytics section in the "Files selected per day" graph, so it seems the choose events are being logged. For some reason the users who are choosing images are not being counted toward our Development User count... Any ideas on what we are doing wrong? Thank you in advance!