@markyang27 I would contact the admissions office at UofM and ask them some times wolverine access does not update with items received there was an earlier post on this thread with someone who had experienced this and contacted admissions who told them that all the material had been received. The other option would be to email your transfer adviser who would be able to get you some answers.
Remember though that they are probably inundated with things from applicants.
But shoot them an email or give them a call.
The information for Transfer Advisers can be found at this link: The Admissions Team | University of Michigan Office of Admissions