I found the issue(I think)
When you create a tag with DGT-GTD (Android App) it will not show the tag untill you use it with a Tag on the app.
After that it will also show in toodledo.
So in short(I may not be clear, since English is not my native language)
If you create a Tag on a 3rd party application, it will not show in Toodledo.
Untill you use that Tag on a task, and then Sync.