Build 16 will have 3 Barbarian, 2 Empire and 1 Atlantean tutorials.
Ubuntu has build 15. You can build it yourself to get a peak at it: BuildingWidelands
We added a "real" tutorial introducing the game mechanics (how to place a building, flags, streets and co -> how to attack and train soldiers) - this one is available via menu and indeed does not need any "continue with next scenario" button. Further there will be the 6 campaign maps that introduce the three tribes (named "tutorials" in older builds like Build15).
So yes, just a communication problem - those maps you mentioned are the campaigns ixprefect mentioned.