IBM New Grad Software Development Engineer interview questions

Extreme Strange, I applied on career fair in Oct 2017, and get the OA about one month later, and in the OA there is one coding question which has some issue with the stream input, so that one not passed. And then on Jan 2018, I suddenly got two following interviews, the behavior interview comes first, and I don't know why I didn't pass, and I got no feedback even I asked for it. And then they canceled the technical interview. Anyway, the whole progress is strange.