why is my microsoft rewards app showing that i only have 520 points when my xbox shows that...

Rewards points are not the same as gamerscore. The 37k you see on Xbox is your achievement score. The points on Rewards are gained by completing rewards tasks. The achievement score is just for show. It gets you nothing. Your rewards points are the only ones that can be used to acquire things.

I am unable to complete the offer where it says to 'claim the points crusader offer on your xbox app dashboard'. I click it and nothing happens. I already have the redeem and points completed.

This Point Crusader is nothing more then a joke, waste of time, and Microsoft jerks you around when you contact them about ongoing issues. I really don't understand why you would have a offer with a time limit and it not work. I have installed the my rewards
app on my xbox 1 and the little circle isn't getting checked off. Yet it show on the page where the offer was, the I own the app

I redeemed from the Microsoft Rewards app on my xbox. I don’t see an order history on there. However, when I go to my order history on my actual microsoft account, its not showing up there either. So, I basically have nothing to back up my case.

Thank you! Thisis helpful. However, I did as you said and deleted the Xbox from my Microsoft account, but it is still showing when I go to the Xbox App > My Library. It's also showing another Xbox that is not showing up in my Microsoft Devices.

Essentially:

Microsoft.com - Shows 3 Xboxs

Xbox App > My library - Shows 5 Xboxs

I have 2 Xboxs altogether.

No issues in any game, I receive all achievements normally

And yes I use the same Microsoft Account in the Xbox App, and in Xbox App in android too.

Problem is when I go in Achievements on the Xbox App to see my points against my friends; it doesn't show the points on my name.