There is nothing that I am aware of that indicates that the breeding or reproductive rates have declined in the south west or the south east part of the state. What declined was the number of does they sample for the data each year. That decline in sample size, during recent years, from those areas has affected the statewide data though since those areas not only have the best breeding and reproductive rates but once lead the state in the number of data samples.
If breeding rates didn't decrease in any WMUs then the increases in the areas where breeding rates were poor ,would far outweigh any effects from the change in sample sizes. Therefore, it is obvious that breeding rates had to decrease in more WMUs than those that increased.