Expanding that tank was not a good idea, and has probably shortened the life of the tank.
Pressure in the tank does not increase the pressure in the house.
The tank pressure, completely empty of water, should be 2 pounds less than the cut-in pressure of the tank.
Pressure is adjusted by the post inside the pressure switch.
Start over from the beginning, drain tank of all water, set pressure in tank when empty.
“Your best interest is secured by making the right decisions the first time.”