Yes, extremely unlikely, but in theory possible.
He's replaced the brake master, and still doesn't see that or the clutch master leaking.
In the last pic he posted, that sure looks a drop of red ATF on the pedal bracket, at the lower right, in the upside-down pic.
A '94 manual trans uses ATF. A manual can be overfilled, if the filling is done through the shifter hole. Not at all good for the tranny, but it can happen and has happened.
At this point, it wouldn't hurt, if only to rule things out, that tranny's upper fill plug be pulled, to check for proper level. And it would be even easier to just pull speedo cable from the trans to see if the fluid is that high, also indicating an overfill.