Hi Agastya, I'm not too sure what's going on as well as I recently just joined the comp. I have several submissions with ID mismath flags. But at the moment I simply sorted the IDs and replaced the test IDs with the sample submission IDs. This trick doesn't really make sense since the IDs don't exactly match, I just did that in the bid to push a submission. Of course, maybe there's something I'm missing out as well. It'll be great to hear from folks that made a successful submission.