I have an Extreme set up as the main router in the house. I also have an Express in a different location in the same house to boost the signal to the other wireless devices. I noticed that my wireless speeds have been getting slower and slower. After looking at how my computers connect wireless using Airport Utility it seems that the Express isnt dropping the connection of certain machines when the are moved closer to the Extreme. I thought it would auto sense the closest router and switch to that one? Whats going on here??