That's not uncommon for gumwall tyres. And manufacturers will cheat a little on the TPI rating. Veloflex for example will count all three layers in the tread area in their TPI rating. So their actual 100tpi fabric is 200tpi on the sidewalls and 300tpi under the tread. Others will count a single layer.

On those 700x32c tyres, depending upon your weight, that formulae speedlever posted works pretty well. You'll find they'll need 75-85psi. Of course it a lot of it depends upon the rider and how smooth you are with riding over bumps, potholes and other puncture-inducing obstacles.