this happened with me too, i made a 测试 问题 and it disapeared, so i don't realy know maybe because the 问题 u made had been made 由 someone else before, so ur 问题 was deleted.
posted 一年多以前
someone disagreed with it but i know one persons 报道 doesnt 删除 a question. i cant help that they were incorrect? oh well