hmm, you sure have a lot of threads going... seems like you have moved some edges by "accident". what I would do is grab the vertex that out of "line" and fit it back there with the right coordinates, but I dont have the energy to explain how thats done atm.
joking right? you made that but you dont know how to move the vertexs? that seems slightly slight slightly....odd.........................
your pretty screwed if you moved them off of the grid they were modeled on..
if you have other vertexs on the same axis you could use the align command and at least have one axis in the right place..then even align with a different vertex which is in the other axis that you need (if one exists)
IF they were moved with snap on.. you could move them in the 2d viewports back to the correct place probably..
or...just start again..didnt take you too long i bet...