For every 10 degrees of ambient temperature change there will be a 2% change in air pressure. For every 1000 feet of altitude, there will be a .48 (point four eight) change in psi. Combine both altitude and ambient air temperature for inflation changes.
In you original post, you stated 125 psi, and again I'm assuming it is for the 215/17.5(h) tire. That inflation of 125 psi. As you dropped in altitude, you also most likely experienced an ambient temperature increase.
ALL of these measurements should be done with a cold tire. When you start adding road heat, breaking/stopping heat, etc., you are going to see a markedly increase in tire pressure. I don't thing 15 pounds of difference between 125 and 140 is that much of a difference regarding heat.
On the other hand, dropping down to 95 psi could have damaged the tires. Depending on the rated weight on the tire, you could have been below the 20% margin designed by Goodyear. You should have the tire inspected.
My very personal opinion is that you should not have let the air out when it was at 140 psi until you could reach a full cold state on the tire, but then, that is my opinion.
Here is a link to
GoodYear RV tire guide.
A quote from their site:
"Unless trying to resolve poor ride quality problems with an RV trailer, it is recommended that trailer tires be inflated to the pressure indicated on the sidewall of the tire. Trailer tires experience significant lateral (side-to-side) loads due to vehicle sway from uneven roads or passing vehicles. Using the inflation pressure engraved on the sidewall will provide optimum load carrying capacity and minimize heat build-up"
So your inflation to sidewall pressures is correct according to Goodyear.
Good luck, and check the tire that was at 95 psi.