Been a while since I was in my 7010...
Is the 5th notch on the pre-sieve open or closed?
I remember having similar trouble last fall with bits of cob and high tailings. I finially did a quick kill and dumped the tailings auger out and it was full of bits of cob... not just a sensor sensitivity issue.
Trying to remember what I had to do... I remember messing around with the sieves and nothing helped so I think I had to close the pre-sieve down. I can remember it being specific to one or two hybrids. I am pretty sure I saved the combine settings for those hybrids in the monitor so I could probably check them tomorrow.
I have a small tube rotor so I am not sure my settings will help you a whole lot. Can't remember if I got it to quit breaking the cob up. I do remember that I also had some trouble with rotor loss because of a few kernels being stuck on bits of busted cob that were going out the back.
In corn I could really care less if I have a fair amount of cob in the tank... as long as I am not throwing it out the back. But I remember the tailings overloading and keeping my ground speed down.
I would try closing the pre-sieve down and then run the fan speed up until you start blowing it out the back and then slow it down a hair.