The standard from receiving a pro rec Y to leaving for OCS was for years 3-4 months, so I wouldn't consider that "backed up" and June and July is typically when you see those who are in the NUPOC and CEC Collegiate programs going to OCS, this is a normal thing.
I’m graduating May 2020 but will be putting my packet in for the October board. Will those that are available to ship sooner (not constrained by graduation) considered before those that have to wait?