Had the same problem...your leak is probably two-fold like mine was...
Mine was leaking under the aluminum track because CC used no sealant at all under or on sides of this track. Also, the little oblong drain holes in the track sections are too small to drain the water volume that flows down the outer-most glass panel into the outer-most track section, and it will actually flow under the bottom of the glass panel and over the 1/2" aluminum barrier wall onto the floor. I discovered this after I resealed as described below...
To seal it right entails disassembling the entire shower door/frame to remove the bottom aluminum track, because the side frames interlock with the bottom. I cleaned the area with alcohol, used masking tape on each side of the fiberglass where the bottom track sits, then used clear RV sealant (silicone won't stick as well) under the track and side frames, then in the inside of bottom track at the corners where it intersects with the side frames. Have bounced around for ~5K miles and no leaks noted.
I fixed the drainage problem by drilling 4 additional 1/2" holes from the inside of shower through the first 3 barrier walls, along the very bottom of the track in the 12" long area where the outermost glass panel hangs.
Hope this helps.
2014 Cedar Creek 34RLSA