Local Channel Help

[betsig250]

Hello I am a newbie and had Voom installed 2 weeks ago. I have a diplexer hooked up that does allow power to go through to the off air antennae. I got the standard small antennae. However, I cannot get all of my channels and I was told that by the installer. Attached is a snapshot from CheckHD.com with my layout for the locals. Is there any antennae out here that I can use to get all the channels? The one I really want is 13.1 and of course that has to be opposite facing the rest. The channels that I need (actually the wife wants) are

WWMT - comes in very sketchy right now.
WOOD - comes in great
WZZM - don't get at all
WGVU - We get this as channel 35?
WXMI - Comes in great
WOTV - The other ABC station - Comes in sketchy.

Any thoughts??
Thanks!
Jeremy