When QuickScore Elite displays music it usually quantizes it first. The quantization amount is the smallest resolution used to display music. For example, if you have a group of eight even thirty-second notes in a beat and your quantization amount is set to sixteenths, your thirty-second notes will show up as four groups of two sixteenth notes, looking as if you played each group of two sixteenth notes at the same time.
It is important to know the smallest duration you are trying to display in a measure. Make sure you set the quantization amount to a value equal or smaller than this amount. If you have triplets in your bar, they won't be displayed correctly unless you set the quantization value to either Triplet, Triplet/8th, Triplet/16th, Triplet/32nd, or None.
You can set the quantization for each individual bar, each individual track, or for your full score. It is easiest to set quantization (as well as other parameters) for your full score (using the Display Score dialog) to what looks like a reasonable value. Then, if there are individual problems, try to correct them on a case by case basis using the Display Track or Display Bar dialogs. Remember that changing a setting in the Display Score dialog will wipe out any settings made in the Display Track or the Display Bar dialogs. So make your settings first in the Display Score dialog, then in the Display Track dialog, and finally in the Display Bar dialog.