From: Kinmel bay
The issue with the AA guns sounds the same as I had, you need to get some more truck replacements before they will go out to the units. In my last Axis game I created several flak units and played the truck card to help find a home for them. With the JU52s, how many transport units do you have? If you only have one and there is already 200 JU52s in it, then there is nowhere for it to go. Create some more transport units and they should start flowing out, remember to attach the new units to a HQ, for the transport units I would attach them to OKH. You also might want to set your existing transport unit to disband status for a couple of turns, as they are more efficient with less units in them, as with 200 JU52s they are over stacked.
I'm not sure why your Italian units are going backwards and forwards, but the reason no more go out to 8th Army is because it is already full. You might find similar happening with minor ally engineer units. Again, if you need them, think about creating extra units to use them up. In my games I create loads of minor ally engineer units and use them to help out with guarding rear areas.