It is not uncommon in "less competitive" states to have multiple noms. It can also happen in super-competitive states, although tends to be more rare. It all depends on the approach individual MOCs take in the process.
There are two benefits in having multiple noms. First, it generally shows you are competitive vs. your peers. Obviously, this showing is stronger the more competitive your state/district are. Second, it gives USNA greater flexibility/more options in offering you an appointment b/c there are more places to which to "slot" you.
The above said, I've had as many candidates with multiple noms be turned down as accepted -- and that includes situations involving both a super-competitive state and a less competitive state.
There is no downside and, as stated, decent upside to having multiple noms. But it is definitely not a guarantee or even predictor of an appointment. If you're not a principal nominee or the top person in your state/district, it really comes down to how competitive you are in the national pool.
I have not factored in that one of the noms may be Presidential -- that doesn't really change the analysis.
