I did extensive research and found keywords with only 5 competitors. I started driving traffic to my site and i noticed every hour i had to raise my bid if not my ads wont show on first page. Now if there's only 5 competitors why the hell do I have to keep raising my bid? I mean isn't there enough room for all 5 of us on the first page? So every hour i get this message on 99% of all my keywords even if there is no one else competing "Below first page bid"
I'm not too surprised, I had the same issue when I used the service a few years ago. It only happened for a bit though then corrected itself.