Wogster

You are right, the longest element is for the lower VHF band, chan 2 to 6, most of these should have been switched to higher freq. to allow for other services, however, the funny issue is "A" channel repeater with no sound, if you get solid video there has to be sound, even in analog rf signal, something else is amiss. Most VHF/UHF yagi have a beamwidth from 40 to 20 degrees depending on freq., the higher the narrower. Pointing at 175 degrees is ideal for you and should work. If one of the digital stations has reduced its power, a pre-amp may help, but needs to be VHF/UHF type. I got a couple of new cheap ones of ebay (RCA model) that works very good. Can be mounted inside near tv or before a splitter, if more than 1 tv.

Being a rental house, not much you can really do without asking landlord etc.

Good luck, note to that weather plays a part in the digital UHF world.