If you could give us some more detail we can probably figure this out.
Could you post the string of data that you copy from the addon to the website? With that we can see what you see.
Do you see items on the website that you don’t have in-game? If so, which specific items? Or is it only when you import it back into the game that you see the issue?
Usually going in-game and activating each of your specs once, and opening your bank or void storage once, will resolve such issues.