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Mixed Signal Cursors (XY Graphs) acting weird ...

I'm trying to plot four XY graphs and have a single cursor able to tell the Y coordinate of all 4 plots for a given X.
I think I've got it setup the way it should be, but when you try to move the cursor, it meanders off in the direction of the slope of the line it's sitting on instead of following the data.

I'm attaching the VI in a .zip since it relies on a few other subVI's and I don't know a quick way of flattening everything into a single VI.  The top VI is called

To replicate, run the VI, let it run for a little bit to fill up the mixed signal graph, then hit the pause button.  Move the cursor slowly to the right and you'll see the corresponding Y values run off on what appears to be a tangent to the curve at the point where they leave.

I appreciate any help or insight,
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Another thing that I've noticed here.  Whenever the cursor points somewhere besides the first displayed data point, the Y values are all enclosed by parentheses.  Like once it enters "interpolation mode" or whatever it is, the data shows up as (1.58833) instead of 1.58833.  Does that ring any bells with anyone?
Again, any help or pointers are appreciated...
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I'm attaching a smaller stand-alone VI that exhibits the same behavior I'm talking about while getting rid of all the other stuff I was doing that required multiple subVI's.
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Which version of LabVIEW are you using? If you are using 8.0 and 8.2, this bug was fixed in 8.5. I would also take a look at this dicussion forum.

Warm regards,
Karunya R
National Instruments
Applications Engineer
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Version 8.5 Pro.
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Hi Michael,

Thank you for bringing this to my notice. I have filed a Corrective Action Request (CAR) to R&D for the strange behaviour of the Y values on the multi plot mixed signal graph.

Just as an FYI, I created a single cursor for the shipping example Mixed Signal and the y values were accurate. Needless to say, I thought this was strange.

Warm regards,
Karunya R
National Instruments
Applications Engineer
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