ernie Mistwalker

I have an senior MIS class of some 7 students who briefly use second life as a final project.  Three were able to create accounts with no problem,  but the last four encountered the "exceeded limit on number of accounts per household error".  I got the same message when I tried to create additional account from our campus site,  but using a yahoo account. Is SL considering our entire campus (lmunet.edu)   a single household ?  If so how can I get access ? Help Lindens !  There are only a few weeks left in the semester.... somewhat frustrated educator....ernie weeks