removing:

x_min_value => $data->[0]->[0], 
x_max_value => $data->[0]->[-1],
[download]

from the args creates this - a slight improvement.

But, as you can see, still way off of displaying as expected. I have a feeling it's something to do with the labeling. Oh joy.

I just ran another test with the live data set. The first graph is as expected, but the ticks are (obviously) wrong. If I add the ticks back in (x_tick_number => 5), I get this instead. Looks like some fundamental error in the area module, maybe?!? Weird...