Stats on profile not correct?

Last week I started a new blog on the name burdie. I write there in Dutch.
When You go to 'view profile' You can see some stats on all the post I had write, or it sepose to be from all the post. When You look to the last post it says it was on September last year. but I wrote several post more. Where are the stats from that post. On the post of burdie say n/a but there are two post of there

Strange but trough