Datamart auto generated Dataset will not refresh

The issue is not just limited to the dataset -- even the datamart direct connection is not updating for me. From what I'm running, the datamart is loaded with data exactly once when the connection is established and then never updates again, making the entire concept of a datamart fundamentally useless.

I don't even understand how it's possible for it to be displaying the data that it is displaying -- it claims to be set to a Direct Query connection to a dataflow but the datamart, both in the actual web GUI for the datamart and in the desktop connections to the datamart, is displaying outdated data that has already been replaced in the dataflow. This data has already been erased and rewritten with updated values on the dataflows multiple times over, but it's somehow still cached within the datamart despite it being "Direct Query".