I haven't done much merchandising, but I sometimes get confusing feedback on mystery shops. It just happened last week that I had a shop rejected. I sent a quick email to the scheduler and she acknowledged that the editor had made a mistake. Corrected immediately.
If you have the option to get a second view, I would always try that first. If you have made a mistake, always always ask for more feedback so that you do not make the same mistake again. I think that's always been appreciated. If someone got upset for me asking too many questions, they won't have to worry about working with me again (and neither will I).
You mentioned someone not following the planogram though. Did you have a planogram to work from? or were you just refilling everything the way you found it?