I'm using coordinates from as CSV file and using Display XY data, however when I do it, the points are far away from other layers and are only visible at a scale of 1:1 as opposed to 1:300,000 for everything else. I've check the source and tried to use the project and define projection tools. ArcGIS says they're all using the same system and everything is practically identical.
Is there a known way to fix this? Is it something wrong with my data?