I approach the river with a wagon holding my 4 raft pieces. I put one raft piece in the river shallows. I hold the next raft piece above my head and right click on the previous piece, it disappears with no graphical change for the first piece. I do the same for the third piece, but get an error message that there is no room in the river for the raft, so I put that piece down, and move the original piece in a new spot, pick up the other piece, and right click on the one in the river. The one I am holding disappears and again there is no graphical change in the original. I then take the final raft piece and right click on what is in the water. It disappears again with no graphical change to the raft. Apparently succeeding in turning four raft pieces into one piece, I pick up what is left and put it back in the wagon.
At no time was there any flower menu from right clicking on the raft pieces.
What happened here?