Sheppard may not have the problem because they have only 8 (?) classes a year instead of 14 (?) for the other bases. I believe Sheppard wings @190 students annually compared to over 300 at the other 3. ENJJPT typically only drops fighters/bombers, those school houses may not be backed up as much as heavies. The latest drops show that out of the 3, maybe 3 or 4 at each base are getting fighters from the 38 track. 15+ are going T-1s.
Additionally, if you read kevsters post he stated he had his UPT class start date, but due to issues, (guessing class size was too large) they have been washing the students back to a later class. I think he stated his start date has been pushed back 3 times already and is now standing steady for November.
Big Blue may decide that c/o 2014 is so backlogged right now that they can't really predict c/0 2015. If kevster is not going to start his UPT class until 18 months after commissioning and 9 months after IFT, I would bet you should not expect to start UPT for at least 15 months after commissioning. Typically the way it works is USAFA grads will always go before ROTC (in their commissioning year group) and they have to slide in the OCS students too, plus Guard and international students.
~ They only have so many IPs and airframes to push them through. Plus they also have a budget to adhere to for the FY. If they go through it by 9/1 than no flights occur until 10/1. It is a lot of pieces in a puzzle that they have to deal with.
I am with Zero, even if they give you a UPT start date, I would expect that it might change at least one time. You also are making an assumption that ENJJPT isn't doing what Laughlin, Vance and Columbus are doing with pushing back. Just because they have their orders and a start date doesn't equate to it staying in place once they get there. Orders are typically cut 6-9 weeks prior to report. The way your post reads is you have yet to receive your orders.