I figured out the issue is with displaying data with more than 8 digits. Basically it’s not showing data along the x axis that is more than 8 digits, including decimal places. So, for example, displaying 1234.567890 will show on the same spot as 1234.567811. When the number is less than 1000 it shows 5 decimal places. Is this a setting somewhere? I read the data back out of the DataAdapter after adding it and it had the same (correct) number so it’s somewhere between adding and rendering it. Also, the ticks show everything after the 8th digit as a 0, so the above numbers are both 1234.567800.