Medication table: drugstartoffset greater than drugstopoffset

[momarsaad]

Hello,
I am working on a project for which I need to extract medications with their start and stop times and use them to calculate the number of administered doses. I noticed that more than half of my extracted medication orders have 'drugstartoffset' value greater than or equal than 'drugstopoffset'.
For one-time orders e.g. frequency=once with equal start /stop, can I assume the dose was given?
What about other scheduled orders e.g. frequency=q 8 or q 6, in case of equal times and start>stop?
Thank you
@obadawi