I hunt north texas as well. We have been seeing some of the same with younger bucks getting fired up. Been my experiance when it comes to the rut you can bet two things 1 its gona happen and 2 you better not miss it. Outside of that all bets are off. Ive seen bucks runing does with hocks tongues hanging out sideways in late october bout 3 seasons ago and Ive seen second/more dominat ruts in late december. We kill most our bigger bucks around the very end of season after all ruts are over for the most part and they really start hitting the food sources. Hang in there and good luck.
God Bless Texas!!! Godspeed our Military!