This is not enough information for anyone to comment on. It sounds like a question for your architect and/or contractor.

Thanks tried to make it short, I guess it's too short!

You mean real pilings, driven into the soil? Usually used when poor upper soils won't properly support structure. A slab on grade porch might move (up or down) in relation to rest of house. At a minimum porch posts should also bear on pilings. Then a little slab movement may not be a problem.

I agree not enough info and maybe even some pics for us to understand what is being done. BTW where is your architect that is who answers these type of questions usually