When the 12v of the dc supply feeds directly to the output of the mosfets, well it looks like that to me from all the information.
Thats correct
When it does this it also supplies the regulator ic2 so the current must be divided between these two destinations.
Thats NOT correct, the current thats flowing into ic2 continues to flow, the 12V power supply is designed to supply the extra current required by the FET switches. There is NO division of curren as such, just additional current.
I would guess that this may be ok as far as the regulator is concerned but I just cant see this being what is actually happening at the outputs of the mosfets.
Look at my attached drawing, the FET's can be considered as switches when used in this way.
So if it is then the current being driven through the primary winding in alternate directions is only part of the supply current the other part must feed the regulator.
No, the power supply feeds both ic2 and the FET switches.
Am I correct, what is going on?