When you do your search, what comes up will say if there is a specific discount or not. It will show the normal rate and the discounted rate. If there is not a lot of availability, few options will come up. This has happened to me on occasion even though I have been doing these searches for decades. I forget. I'm old.
If you want to get out of that, look at the top part of the screen that is right under your search parameters. It will say something like, "3 Offers Match the Selected Travel Dates and Resort" with buttons next to each. If you are in a discounted category, and want to see what else is available at rack rate, click on, "room, offer type, room" or "package, offer type, room and theme park tickets". This will usually give you more options than the discounted category. You can switch back and forth to see what's available.
You do not have to go and clear all of your cookies but that is something you can tell someone to do that will quickly help them vs trying to explain other ways of looking which they still may not understand.