Add a detailed manual online somewhere and include the most common bugs.

The title says it all. Example: I am playing easy-level Timberborn (I am new to the game), started with Folktails, and now I unlocked Iron Teeth. Great. So- how do I get Ironteeth beavers to show up? Can't figure that out for love or money, and I must assume I should be able to get them now in the same game, why else tell me they are unlocked?
Bug- I am staring at a water pump that insists it is not connected to a path. Well, it is and it is also slam right next to the District Center so it is not too far away. And yes, red lines. I have demo'ed and rebuilt this pump 4 times now, moving it around for as much as this was possible .
Otherwise, great game. The district thing is a PITA and has made me start again 3 times already but I am sure I will eventually get it.
Edit- I just added a house on top of the other one, stairs and path, next to the Center and sure enough, same error. The bottom house is ok. the top one is not.