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 Gummelt's Decagons 

hi, I was trying to make some images for the Gummelt's decagon section, and I've run into what appears to be an error in the article. It states that the only two allowed overlaps are those shown in this image. However, the following sources seem to say that so long as the red areas only overlap other red areas, anything goes.

Source 1 (p. 2)
Source 2 (p. 2)

Now, as I was drawing this image, I found that I could not get the current ""only-two"" rule to hold as I built the tiling, but if I used the ""so-long-as-they-match"" rule, it would work. Is the article wrong, or have I got it mixed up?
Cheers, -   "