Public library wifi becomes limited access constantly. Any workaround?

So I have this problem that has been bugging me for months. I use the public library often. I have an Acer Aspire One Netbook and it works great 99% of the time, except in this specific library. The wifi just will not stay connected. It stays connected in almost all other public and private places but not this library. Now it is a big library and I'm using the standard Windows 7 wifi software so the library wifi only shows up as a single entry in the list of available wifi networks. However when using inSSIDer I can see that there are 11 SSID's with a mix of channels 1, 6, and 11. The wifi is all open with no password. My feeling is that it possibly keeps switching to whatever signal is the closest but I'm not sure. All I know is that it sporadically will go to limited connection and I have to manually disconnect and reconnect in order for it to work again. I can wait it out but that takes longer.

Is there any way to have me stay connected to a specific SSDI or channel? Are there more optimized wifi software I can use besides the stock Windows software? What would be causing it do go to limited connection every 10 minutes. Also the connection is great 4 bars usually and it doesn't physically disconnect it just becomes limited and then there is no use. Any other ideas?

Thanks

EDIT: Added inSSIDer pic


Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Celeron(R) CPU 877 @ 1.40GHz, Intel64 Family 6 Model 42 Stepping 7
Processor Count: 2
RAM: 8028 Mb
Graphics Card: Intel(R) HD Graphics, -1924 Mb
Hard Drives: C: Total - 460453 MB, Free - 130985 MB;
Motherboard: Acer, Mimic
Antivirus: avast! Antivirus, Updated and Enabled

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