Igor wave display

I have an Igor wave which I extracted from electrophysiological recordings. When I display the wave, I can see the graph that I want but when I double click the wave to look through the points, the wave looks empty. Can anyone help figuring out why is this happening? 

I attached the picture of the displayed wave and the wave itself.

 

Many thanks in advance! 

This is how the wave is displayed wave with about 5500 points (41.06 KB)
sjr51

When I display the wave in a table

Edit/K=0 root:Cm_1_1_1_Cm

I see it has NaNs for points 0-11 and then the data starts, i.e. if I scroll down the table a bit I can see the data.