Related Table Chart widget issues in Web AppBuilder (Portal)

[KRubalcaba]

I am editing a Related Table Chart widget in a web application (Mosquito Population Surveillance Charts) using Web AppBuilder in Portal. I am attempting to create a chart for a related table, with the label field being a date field. (see screenshot below)

It seems like everything is set up correctly, but the widget is adding integers to the X axis (label field), along with the dates. (see screenshot below)

We want to be able to see, at a glance, changes in population over time. Another option would be a bar graph, but I do not see the option to change the layout from horizontal to vertical.

Has anyone else experienced this as well?