I organize some smaller competitions in the Twin Cities, MN: Dabbler and Byggvir's at the Renaissance Festival. I also help a few breweries with their ProAm selection competitions.
A lot of contests, at least locally, have gotten so big that they usually only assign two judges to a table and that is most often an experienced BJCP judge and someone with limited/no experience. I can't help but to think that as an inexperienced judge you might feel pressured to go with the other person's opinions. Just because someone hasn't judged before, doesn't mean s/he doesn't have a great sense of taste/smell. Most need practice to find the words and understand what they are sensing and how it affects the beer/causes. There is a time factor too---I have seen a lot of contests with very tight time schedules and very full (10-12 entries) flights. That makes for rushed judges and often the score sheets suffer.
I try to have three judges a table---I find that is a good mix of knowledge levels. I also don't judge at the contests I organize. Instead, I walk around and spot check the quality of the score sheets. I talk with inexperienced judges and explain how to fill out the score sheets and ask about what they are sensing. I am also at an advantage, since I have been doing BJCP exam prep training classes since 2006, I know who should be filling out solid score sheets and who is slacking (and call them out on it).