OpManager 12100 creates a wrong dashboard graph

Another day, another issue.
Summary: I found that if I create a graph through the dashboard the displayed values are correct, but plotted incorrectly.
Description: See the graph 1 created through the "Last N hours".

Except for the ugly, not-editable scale it should be fine, right? Nope. Face the values as reported from the interface to the ones built into the dashboard graph:

Graph 2: Last N hours (correct value, wrong display)
Graph 2a: Interface (correct value, correct display)

The same goes for the other way, graphs 3 and 3a.

I definitely need a fix for this. We can't replace our actual OpManager v11 if we can't plot real graphs.