I don't know what to think sometimes, I had a young buck walk right up to within 20 yds behind me during a light mist one year while smoking a camel playing blackjack on my cell phone. I was out cutting firewood and shut the chainsaw off and turned to see a nice 10 pointer (and I mean nice) watching me. That one caught me off guard and was just a week before the gun opener (about nov 15th) and thought it was rut activity but not a doe to be seen.
This goes back to what I was saying elsewhere about bucks in rut being weird and stupid. My guess would be those bucks were probably figuring out if you were mountable.
I've had bucks with nice racks surprise me at the strangest times. I had one come over to my ground blind and peek in once-- sadly I didn't have a buck tag left. I've had them catch me taking a dump. I've had one follow me down a logging road. I shot THE BIG ONE back in 2007 and then had to wait for half an hour while 4 sub-dominant bucks came and hung out under my stand and displayed for each other. I was not going to climb down into that mess, let me tell you!
Last season was the first that I've ever been able to string several days together hunting the peak of the rut. In the past, it's always been a weekend here and there. I really got to see the whole rut develop and peak and fade. There were about two days where it was just crazy. Bucks were running everywhere and would come to anything-- calls, rattles, even the creaking of the stand. I don't think they cared about scent. I don't think they cared about anything except their compulsion to breed.