Have you checked your email to see if there's any from iTunes Store? Our experience is that if there is something seriously wrong, the uploaded build will get rejected and removed from web page minutes/hours after upload finishes, but there will usually (not always) an email from iTunes Store explaining what went wrong.
BTW, based on submission date of the messages above, there seems to be a burst of such issue in the past 10 days. Personally, our company just found this week that there seems to be recent bug where any IPA bigger than 4GB will cause an "Invalid IPA" error and fail to process few minutes after upload finishes; and these IPAs will not show up on iTunes web page, but they do trigger emails from iTunes Store with the Invalid IPA error inside. I don't know if you guys are hit by the same issue, so mentioning that just in case.