If recocking manually works, this magnet trigger mod will work. But i understand, you want your gun put back correctly.
Unfortunately i dont have a T9 and am not positive if its set up the same as the T8, i assume it is.
My suggestion, go on youtube or the tiberius forums and watch a video on the disassembly and reassembly, you may be missing one crucial step, or be doing something a little wrong. (or its possible that your grip is cracked and the spring will fall into the grip causing no return of the trigger)