Understanding Line Graphs - Advice Appreciated

Hi All!

I am trying to get a line graph to behave in a different manner than I have tried before, and I am afraid I am failing miserably.

First, here is a snip of what I am attempting:

Now I am trying to use the Primary axis for every instance of SUM(total) except when category is "A", and use the secondary axis for the "A" values.  This is because the "A" column is drastically different in size than the other categories, and renders all graphs useless when they are displayed together.

I am using the following expression to separate the data in the top series.

=Sum(IIF(Fields!Category.Value <> "A", Fields!Total.Value, 0))

Now this works, however the legend still shows for "A" in this data series, I can not for the life of me display the line for:

=Sum(IIF(Fields!Category.Value = "A", Fields!Total.Value, 0))

And likewise the legend is showing for all categories for this series.

Here is the result (this is the best result I have come up with so far, and still very wrong :/ )

I may just be missing the point here, but any help would be appreciated.

Thanks in advance!