You're certainly not alone there. I often mix up Bucharest and Budapest. To make matters worse I often mix up Romania and Bulgaria too, which results in me sometimes thinking Budapest is the capital of Bulgaria - completely incorrect!
And you're clearly bragging.
Reason I ask is that it is very easy compared to the quizzes you are compiling at the moment.
In any case, keep up the great work, it is appreciated.
Don't you hate it when you get a typo?