Hey Alfonso,
I have noticed that JetPack (or the older WordPress.com Stats) takes some time to report the stats, and that causes the value of the number of views to jump from one value to the next. So instead of showing a realtime count, it goes from 0 to a much larger number in a matter of hours.
So, first give it a little time to update. I have a question, how long ago did you install Post ‘n Page Views on this blog?
Rono.