As far as the throw and mow goes,what if your bushhog doesn't scatter the grass under it while cutting. Mine rows to one side coming out the back. I've used land prides before and they mulch the grass up evenly behind the bushhog which would give the seed good coverage but with the Howse brand that I have it doesn't do that. I didn't wanna waste a alot of money on seed to have it come up in rows and feed the birds. I thought about letting my fields die off and put my seed out and just disk once to get a little dirt up and let the wheat and oats cover the seed kinda like CNC did his garden.
Try reducing your RPMs. This provided more even distribution for me.