Line Chart X-Axis Issue

I have several tables, each of which have a 'Value' column and a 'Created' column (in date only format).

I am trying to create a simple line chart that displays 'count' of all of the different values over time. For example, if a record is created in 'January 2018' and is still there in 'May 2018', I want it to be recorded over all of those months - or in other words, cumulative.

For the X-Axis, I have included the 'Created' field from one of my tables. This displays a line chart that doesn't display the correct dates along the X-Axis, and goes way beyond (and before) the date ranges contained in the 'Created' columns for all of my tables. Also, it just displays a static value for each series across the entire range.

How do I create a line-chart that displays my data correctly?