G'day All,
He didn't say that they move up when he pushes forward, just how far should they go.
It depends on the size of the plane, but if they are not even, you probably have not set your elevator servo so that the push rod is 90Deg to the servo arm when at neutral, with trims in the centre, remove the servo arm off the servo, disconnect pushrod, if computer radio, set subtrim to 0, put servo arm back on servo so that it is as close to 90deg to the pushrod as possible, then adjust subtrim until it is 90deg, hook up pushrod to servo arm, & make sure elevator is at neutral, ie, straight inline with horizontal stab, that is the mechanical side set, now go into end point or ATV or servo volumn adjustment, depending on radio brand, & adjust so up & down are the same, usually 100% both ways.
Seems like a lot, but when you learn how to do this you will be able to do the same for every plane you ever own. It's the same setup for ailerons, rudder, & elevator, to get even movement both ways.