graphs are stacked, not shown individually

[tbeitter]

Hi there and thanks for Sick Muse in the first place.

My fresh Sick Muse installation sums different values in a graph

That leads to wrong values on the y-axis, see temperature. I've got 6 values around 35 and the graph sums them up. Is there an option I missed, is this a bug or could are the values falsely collected by collectd?

Thanks in advance,
Til