Starbucks,
I don't understand how you would apply for an "increase" in your PFT. If you have a PFT currently, then it must be for a figure in excess of €2.3m (because your pension value was already in excess of €2.3m when the cap was reduced to €2.3m).
If your value increased subsequently above the PFT then the excess will be subject to the double taxation. You cannot apply for an increase in your PFT just because your value has increased. Your PFT is fixed at the level you applied for in 2011.