As a result, the site is (currently) correspondence rather than account-based. If you want to play with strangers, Dragon Go Server is the place to be.
I am thinking about adding accounts and rankings in the future but if I do so, I want to make sure I can differentiate enough from DGS to make it interesting to people.
There are only two toggleable options on the entire site that would be better served by a combobox. The rest are binary. The two in question both appear on the sign-up page and both are rarely used (based on the site statistics.) Therefore I opted for the less "correct" (and less usable) but more visually consistent option.
If all you're doing is spinning those two options around to test the site, then yes it certainly could be annoying. But my hunch is that for the average use case, it's just not a big deal...
I like toggable settings by the way.