I have a chart that shows three different datasets. It is an XY Plot type. They all share the same X-axis, which is a number of hours a process has run. The datasets all have two columns, the first is the x value and is an integer. Everything displays fine on the chart. My issue is that when I hover over a point and PMI displays the tooltip, it shows the x-category as a fixed date. For example if I click on the gravity line, I get the following in the tooltip: Gravity: (12/31/69 4:00 PM, 3.9)
The Y-axis looks to be about 3.9, so I believe that is correct. Any idea why it is displaying the X-axis as a date? It does not appear to change from this date, even if I pick a value further along the x-axis.