Put new light switches in mobile home bathroom. One panel, two switches, controlling three lights. Old style switches, had a jumper between them. I could only get the switch that controlled two lights to work, until I added a jumper. Then all lights worked. So I thought. Now the switch that controls the single light, is always on. Other switch works fine. Turn off both switches, but the single light switch, the light does not turn off. Do I move the jumper? I installed one pole switches.

You need to put it back exactly how it was. If you can't or don't remember then you need to use a tester and find out which one is the hot feed. That will feed both switches. The other two wires are your switch legs (powered only when the switch is on), they obviously go one to each switch.

If you Google around I'm sure you can find a diagram showing one feed with two switches.