This happens after dragging and dropping additional Statistic Parameters into the "Overall Throughput" window and disabling the related checkboxes for displaying them afterwards.
I've never seen such glitches. Are you using NeoLoad under Windows 8? It's maybe a graphical issue specific to your environment. Did you try on another computer?
It seems that it's a bug that may happen on very rare cases. The graph is not refreshed properly. This bug is opened on the R&D side. It will probably be fixed in the next NeoLoad version but not sure if it will be the case of the 5.0.x versions.
