Problem is that when you are in a perfect stationary hover, there are perpendicular forces (wind) that should be compensated with the only thrust force you have available, (26 pounds), making your vertical force equal or less than 20 pounds, and consequently making impossible the airplane to climb, or even stop falling.
But donīt mind about what happened.. you arenīt the first nor the last to screw up with a model jet.. fix this stuff as soon as you can and keep flying it and having fun.