If a parent is denied a plus federal undergraduate loan, I was told that the student may become eligible to recive an addition stafford loan. I am going to be a junior so the limit would be $5,000. If I request the the maximum of $5,000 are there any possible reasons why I would not be permitted to request that amount.

I am asking because in the past, my family had  been turned down for the plus loan. I requested an additional stafford loan of $4,000 but I was only provided with $355. I'm not sure if this was a mistake or not.