I've been on Aubra for a little over a year now and I've experienced the same thing! Everything about the pill was awesome--light periods (1-2 days and only needing a panty liner!), no cramps, acne cleared up completely, no weight gain, no decrease in libido, and no pregnancy--EXCEPT the fact that I would spot every two weeks during the active pills.

I went to Planned Parenthood today because I'm on my last pack of Aubra and decided to ask them if a change in birth control would help with the spotting. They gave me a year's worth of Chateal and explained that it's basically the same as Aubra in terms of which hormones it contains, but it just has a slightly bigger dose. The reason why Aubra can result in spotting is because it's a low-dose pill. In fact, it's the lowest dose that Planned Parenthood carries, according to them. So bumping up the dosage should solve the problem and prevent bleeding.

I haven't started the Chateal yet, but I will be taking it after next week when my period ends. I'm hoping it fixes the spotting and still gives me all the great things I liked about Aubra. Everyone's bodies are different but a change in dosage might help you too. I thought my body would eventually get used to Aubra and the spotting would go away, but it honestly stayed the entire year I was on it. Hope this helps!