Scatter plot of Standard deviation adding legend filter

[mcginnisgt]

Hi! 

I am attempting to plot test data for numerous samples.  I am trying to plot standard deviation of a certain value vs another field and add the test sample to the legend, so I can filter out the samples.  When I add the the sample test to the Legend it plots the standard deviation as all zeros. I have confirmed this is not the case.  Any suggerstions? I've tried scatter plots and line plots.

[mcginnisgt]

I will also add that this also happens with Variance.  I have to remove the Legend data to get them to plot. But then I can't see the difference between sample.  What I am trying to see is where in the x-axis the standard deviation is highest and the amplitude for each sample.  I have even tried RANKX and the same thing happens