[vanderZwan]

I suppose the part where the writing structure is "question written as if by someone who does not know the answer themselves, answer written as if it's a different person", even when explicitly posting to share knowledge, is what throws people off. I assume this is part of the SO guidelines but I can't blame anyone for being confused by that.

[rippercushions]

SO allows multiple answers per question. I have on occasion asked something and given a crappy/hacky self-answer as a stopgap, with somebody else eventually chiming in with a much better one later.

[quietbritishjim]

There's nothing about the question or answer that suggests that they're different people.

FWIW I've done the same, even more like that than the post here. (Not about Lego though!) I had a problem, was disappointed not to find the answer on StackOverflow so when I came to post the solution I put the question in the way I would have written it before I figured out the solution. Seemed more likely to be found by anyone with a similar problem.