HS.....those late rubs you are seeing are more likely made by larger bucks battling testosterone. All bucks do the velvet rub....and true enough, some rubs are signpost rubs. Like Dan said, even muleys have home ranges.....just much larger than whiteys. But those later rubs.....larger more aggressive rubs....are more likely made by a big bruiser horny old buck swaggering around, totally frustrated and/or challenging other males and serving notice to all comers that he is one to be reckoned with.....much in the same way elk do. Many times the bigger the buck the bigger the tree and higher up on it he rubs...but this is not always true. He leaves his scent on the rub and will freshen it often while in an area. Other deer recognize this and there is definitely communications going on.....much the same way a ground scrape serves. They have a very complex form of communication and this is part of it. Most of the larger bucks I have taken have had fresh bark in the knarls of their bases, including the big bruiser muley I took in middle November last year, indicating he made one of those late season rubs you were talking about.
Key in on the fact that the later rubs are rarely meaningless and never velvet rubs, but more often a mature buck making a statement, if only for a brief time as he passes through. That is why the blood should start pumping when you find one of those rubs that is so fresh it looks as though it was just made.....it's maker may not be too far away. Look for rubs higher up indicating larger deer, and with deeper gouges, indicating stronger more dominant bucks.
These rubs probably help us little in harvesting a big buck, but they sure do add to the excitement of the hunt when you are standing in front of a good one!
Dean, I can tell you know quite a lot about rubs and their meaning. Whitetails are more predicatable and finding big, fresh rubs can be more useful in the pursuit of them. I can remember finding big, impressive rubs on the edge of thick bedding areas and hanging a climber over it for a few days.....many times ending successful.