iOS 6 twitter integration - permission list mess

... not sure how it was on iOS 5, may be you could delete apps from the permission list for twitter. Now you can only turn them on or off. Okay the thing is that I could tweet from an app (lemonde.fr) using the integrated twitter interface in iOS without being prompted to allow it. Weirder is that I could tweet but still, the app doesn't appear in twitter's permission list on iOS, but it does in the allowed apps list in twitters's own web interface (from a PC's browser). And it does appear there as an app having been allowed from iOS, so there's no way to revoke it from there. This should be normal as one can only revoke access from twitter to iOS globally only. But again, why doesn't this app appear on iOS in the twitter settings permission list ???