Does anyone know why my promotion orders could have me listed as my prior MOS?

Needs off the Army regardless of component, I started out an 11B with about 4 or 5 ADMOS's While the Reserves did away with Combat Arms units it has plenty of former AD 11 Series positions out there. 11 Series Soldiers are sometimes like universal parts that can be slipped, beaten or forced into a running machine which is the Army normally. Sometimes its a clerical error sometimes it to get you promoted. I could be wrong and sometimes am, If you got picked up as an 11Series for promotion it could be because your current PMOS had higher numbers for promotion. Look at your Promotion orders it should show your Primary and secondary. MOS and what you were picked us as if I recall.

On a Side note I served in a Civil Affairs Battalion as an 11B and then an 11Z with no Infantry slots on the MTOE. But I did have one of the required MOS' on the UMR. It won't hurt you unless there is a glut of other Soldiers with your MOS, It pays to have secondary and additional MOS's come promotion time, you are more marketable to big Army :)

Common misconception about there being no 11 series in the Reserves. You should change your profile to USAR so the Reserve people on here can see and better answer your question

SSG Williams, Having served on the Army Reserve promotion boards... Its possible that when you submitted or it was entered into the system, it listed your old NCO as an additional MOS. IF that is the case, the promotion board will look at all MOSs you have noted in the system. I reported this as an issue as soldiers should not be considered for promotion in an MOS they have competed in year (five to ten year time frame).

In any case, my guess is they popped it in as it was listed on your 2A or other document.

That said, there are many combat series MOS's available, especially in the training unit. Most are good opportunities for senior promotions (SFCs, MSGs and some SGMs). But it usually means more travel and some longer hours prepping for training weekends where you train soldiers on re-classification courses. But that might not be too bad as these days, cost of travel expenses are now becoming part of the position (whereas in the past these were out of pocket expenses). Even air travel is covered. Check with the new unit if they have a unit or detachment close to your home of record. They tend to be very flexible to work with to retain skilled instructors, especially if you're looking for future promotions and willing to travel. I took a stint and it turned my career around (was an SSG for 12 years before taking a position as a SFC in an MP Training unit). Eventuallly led me to reach the rank as a CSM for a 2-star general. So give it a try.
Good Luck and Congrats on the Promotion to SFC>
BOB S
CSM (R)