Sample rate of graph too low?

I created an electricity sensor yesterday and started uploading the data to the EmonCMS beta environment. I use the default dashboard for showing the data.

However, the Graph showing today's usage under the  "Power Now " dial seems to have a very limited sample rate. I am quite sure that I have more values uploaded and you can see that in the normal usage graph as well.

Can anybody tell me why the graph on the right (below the "Power now" dial) shows this low sample rate compared to the graph in the left in the dashboard screenshot I attached?

I use the following widget code (as default):

  <div class="widget">
    <div id="house-graph" class="graph" feed="Power"></div>
  </div>     
 

In other dashboard screenshots I see far more detail in the same graph:

http://openenergymonitor.org/emon/sites/default/files/singleCT_dashboard...

Your help is appreciated!