I just posted this in another thread, but I will post here too.
My mother said she tried voting for Josh for the entire 2 hours and was never able to get through.
I am no telecom expert, but I'm wondering if all lines aren't tied together and the reason you do or don't get a busy signal has something to do with the 1 circuit that all lines are part of....or perhaps even the region you are calling from.
I do not believe there's anything fishy going on. They wouldn't risk the legal ramifications if they were to "fix" the results.