I had a similar occurrence at work. I use dual access points, one at work and one at home. I have an Orinoco/Proxim/Lucent RG-1000 with default encryption at work and a Linksys (non encrypted by default) at home.
Ever since I received my Acer, I have been getting both Orinoco and Linksys profiles in my Wifi configuration software while at work. I just figured it was memorized from my home. The problem is at work, it defaults to the Linksys router and not the Orinoco that I want to use. The Linksys usurps the wireless connection!
Well, just in case their was another network in my building, I did a search of "My Network Computers," and walla, I logged onto a Real Estate/Mortgage company in my building with all their financial files etc. non encrypted and showing! It turns out that my memorized profile was not my at home Linksys profile at all, but another hot spot and non encrypted!
The owner of the company happens to be a patient of mine. So, using one of "their shared printers," I printed out a quick letter explaining to them what was going on and letting them know that anyone sitting in the parking lot with a wifi had total uninhibited access to all their financial and business information!
Also, it is interesting how the configuration software defaulted and usurped, to the non encrypted Linksys profile of my neighbor, instead of the encrypted Orinoco that was mine!
I have to change the name of their Linksys connection SSID in order to capture my desired Orinoco AP!
Make sure you encrypt your configuration software and check for "My Network Computers."