Category Chart - Problems with x-axis (category axis)

I am using the Chart component with a category x-axis. I have some lot numbers with measurement values. I have two different data-sets for different model numbers. The problem is when they I plot two data-sets to the same chart with the category line/shape renderer the points don’t align with axis.

Basically the data-sets come one after the other in terms of lot (where one ends the other should begin after). The plot is just placing them both ignoring the axis.

Any solution for this? I am having the same issue.