What kind of shortcut and what do you mean with "create"?
In Photoshop, there are actually only keyboard shortcuts. They can be managed and set up, then saved to a custom shortcuts file.
Yes it is a keyboard shortcut that I am talking about..And I have saved it to the file..Still, I use it once and it reverts back to photoshop default..
Sorry, no further idea what can cause this.
Is the shortcuts file truely saved to disk? You can find in the user path, where the preferences and presets are stored for PS. Or if you go to the dialog again where you change shortcuts, is it reverted there too?