Don't think I would call water spitting out of my city water connection when running the water pump to be "operating as designed"
Lee I have replaced mine but I replaced mine due to the valve failing & had a situation as you describe. I would try Joe's suggestion to see if the water pressure coming from the outside will get it to seat correctly. If that doesnt work if you disconnect the hose connection on the inside of the trailer can you see the valve on the fitting - perhaps it got moved on an angle or went missing?