The note I recorded is displayed with the wrong length. For example, I recorded a sixteenth and got a quarter note.

You probably have the wrong Display Quantize value set. Open the Score Settings dialog and select the Staff page. If Auto Quantize is activated, deactivate it, unless you have mixed triplets and regular notes. Also check the Notes and Rests Display Quantize values. If the settings are too “coarse”, change them to a smaller note value. If you for example need the program to display an eighth note rest, Rests Display Quantize must be set to “8” or a smaller value. If No Overlap is activated, you might want to turn it off.