Short answer - your getting ripped off and there is no doubt to it!
You are not alone - i have heard of this type of going on before.
As the previous posters have mentioned youll only go solo between 10-15hrs by which stage you will have a good hours worth taxiing - without being gods gift to aviation youll be able to taxi fine after just a few lessons. As far as the sim - how much are u paying? In anycase its too much - there is nothing a GA sim is good for apart from procedural IFR flying which you wont need to worry about until after your CPL.
My advice would be to either take your money and run or at least ask for a GOOD explanation from the powers that be.