When you select a map type, big_and_small for example, first you are prompted about "continents size", then "island size", then "island overlap" and so on. BUT, after starting a new game in this map type, quitting and going back to main menu, and then choosing big_and_small again, first prompt screen is about "island overlap". "continents size" and "island size" screen are skipped! You have to go back two times to go to the "continents size" screen.

It isn't a very annoying issue, as only two clicks on "go back" solves the problem, but I think it's a bug.

Hmm. Just in case you are interested to know: If you use the "custom game" instead of "Play Now!", you can change all these settings (and a lot more) on one screen.