I have an Allstar receiver model 110548 MVP hooked to two garage door openers. My service company recently came and while servicing set up another transmitter - model 110995. They programmed the left button for one door and the middle button for the other door. I wanted to add another transmitter so I ordered the same model from Amazon. I cannot figure out how they programmed both doors. I am able to get the left door to open with the left most button. But I can’t get any other button to open the other door. There doesn’t appear to be anything in the instructions that references the second door. Does anyone know how to get two transmitters on this garage door? Thanks.

Helping a neighbor with an old Chamberlain 2000SDR opener (1/2hp screw drive, built 1998). It has safety lights (optional at that time). Last week, the opener started not closing all the way to the bottom. Weather here was around 30-40F so not extreme in either direction. I have moved the door manually up and down and it moves easily. Only possible issue with manual movement is that it it floats a little near the bottom (too much spring tension I would think). Anyhow, the downforce was already at max so I adjusted the down stop limiter to go father. That lasted a few trips up/down but now the door is back to its prior pattern of stopping 6-12 inches from the bottom. There are no flashing lights when closing and the safety beam lights appear to function properly. The only other symptom I can describe is that the closer motor sounds like it is weaker/struggling near the bottom of the door travel. I can try to adjust the down limiter further but I am not sure what that would really solve. I feel like I am treating symptoms and not the core problem. Does it sound like the motor is just worn out? Try adjusting the stop limit further? What else is there? If a replacement unit is recommended, what would be a good replacement for this unit? No extra features needed, just a basic opener. - Peter