Series scaling probs w/multi-series XY plot

[User (Legacy)]

I'm plotting two series.  Both have the same range of x-values, but have 

differing numbers of points.  For example, the x-values for series A and 

series B both range from 0 to 1000.  Series A has 250 points and series B 

has 125 points. 

When I input series A, it fills the entire graph as I would expect.  But 

when I later add series B, series A "compresses" to fill only the first half 

of the graph and series B fills the entire graph. 

Both series' have the same x-values for their first and last data points, so 

why does series A get squished to fit in only half the graph? 

Thanks, 

-Ed Evans