It's not a malfunction, or a technical issue. Many countries won't see any autopromotions until they build some units.
I'm not sure about the number of units required, (and kind of surprised it is not in the Wiki) but here's an example:
If the requirement is 50 divisions for a Field Marshall slot to open up, and you start with 2 Field Marshalls and 90 divisions- you are going to have to build 60 divisions before one of your Generals autopromotes to Field Marshall. Unless you have too many Generals, one of your Lt. Generals will move up a notch the next day. On the next day, one of your Major Generals will get promoted. That's an inaccurate example, but someone will come along and correct my numbers shortly.
Don't worry about it too much Fox, you are playing the Soviets and you start out a little top-heavy. When the Purge happens in 03/38, you'll lose the overstock and be pretty happy with the results.