Strange Chart Rendering

[bonedaddy]

I'm getting some weird results in my charts and I'm not sure how to fix it.

Take this image:

There are strange blue lines throughout the entire graph and I'm not sure how to fix. here is the code where I generate the charts

This appears to be happening on smaller timescales. For exmaple the 1 is a 1 day chart and the 2 is a 2 day chart, and the bad rendering only happens with the one day chart