Challenger, it does have a metal valve stem, and that may be the problem because the original stem was a rubber one, like what is on a car tire. When I had a new tire put on it, I had them put the metal stem in and have had problems ever since. That's why I want to go ahead and put a regular Valkyrie rim on the trike.
"because of the hole they put in it for the valve stem"
so they made an extra hole or enlarged the existing hole for the metal valve stem? neither needs to be done to install a metal valve stem.
either way they ruined your wheel and need to provide u with a new wheel.