Sometimes, the console sampling timer is not invoked at the time it is necessary. Especially the sampling in VM is deadly unpredictable. So far nGrinder calculated the missing sampling and write the multiple sample point into files using single sample to catch up the missing sample point.
However it does not look good. the same values on the multiple x axis makes the graph not valid. The appropriate approach will be to make those point missing in graph so that the line are drawn b/w existing well calculated points. It's more valid and practical.
In addition, previously it first copies current value first and repeat it multiple times, however it might be better to make all point empty except last one. It's more accurate.