Yeah two balls are coming down at once from the RHS ramp when the pin drops.

OK..

1stly check correct coil - should be AE-26-1200.
2nd - check actual assembly is secured to underside of playfield (ie not loose).
3rd - most likely the coil sleeve is dirty / worn.  Not sure if you've seen one before.  Its a consumable part of the coils and need changing every so often.  I would advise to replace rather than clean.
They are only about $1.00 or so. 
The part number is 03-7066-3.  Either RTBB or Mark should have them.