Can't use "L" Key to select an object, selects vertices instead. So I've got my character model divied up, and I can select all of his limbs that I've split with the "L" key. But when I try to select his left foot, it simply will not select the whole foot. The right foot is totally fine. But the left will only select a face if I press L over it. I've tried on all areas of the foot but it still will only select the individual face. Here is a picture of what the right foot does when I press "L" over it, and what happens if I do the same on the left foot.
It could be that you have double vertices; multiple disconnected vertices in the same location.

If each face in the left foot is separate, it would result in symptoms like these. Try removing doubles by selecting everything (A) and pressing W> Remove Doubles.