Hello, I am hoping someone can help me. My starboard trim works well and I can hear the mechanism working and see the movement on the gauge. My port trim seems to be stuck in the max UP position. The gauge shows the highest setting and when I press the down button I can hear the trim mechanism working but it doesn't stop humming as long as the button is pressed down (on the starboard engine once the trim hits the lowest or highest setting on the gauge, it stops humming even if I am still pressing the button. What do you think is causing this? What are the effects of sailing the boat with mismatched trim levels on the engines? Also, what does the middle button on the trim controls do?