multiple parameters with autocomplete

Using rails 2.0.2 and the autocomplete plugin, with my site
http://www.slangasaur.us, whenever i try to render an autocomplete
request with two parameters, the second param shows up with a amp;
infront of the parameter, and i cannot retrieve it in my controller. If
anyone knows a work around for this or if this is not a problem in 2.1.0
please let me know. Thanks!