You could still have air in the system, but do you know how far your friend depressed the pedal when you two were bleeding the system?
I have heard that you're not supposed to push it all the way to the floor because you're pushing the piston inside the MC past a point it is not supposed to travel (when it has fluid inside). You could potentially damage the seal internally, which would allow the MC to not pump up enough pressure. This is important on older cars like ours, and a lot of people use a vacuum-style pump at each wheel, or even gravity bleed, to not have to deal with this issue (plus, you can do it by yourself with one of these two methods).
Does it build up pressure at all now? Or is it too soft no matter how many times you depress the pedal?