Hey there, personally I think it's much better to have a short, easily read and followed chapter than a mammoth chapter. I made the mistake of writing up one of my major analyses in one whole chapter (there were the same data collection, methods, similar analyses just different looks at the data)... it ended up being 70 pages (with lots of pictures!!!). It's very difficult both to write such a long chapter (and make it coherent and a nice story) and to read (supervisor has had it for 3 months). So don't worry about it. Short chapters are great!!!!