Flagship is singular 

Many states have two (or more) excellent state universities; often, one may exceed the other on one or another measure of excellence.  But a state with two excellent universities has that - not two flagships.  "Flagship" is a singular term - a good reference for the word generally can be found here.  In this context, "flagship" means, as the introduction says, "the leading comprehensive public research university in a given U.S. state".  (The only sort of exception that makes sense in this context is a system like New York's, where the state university system resembles a system of franchises more than anything else.)  With this in mind I've edited the list to remove some schools that are plainly not a state's "flagship".  I left a state's entry alone if I wasn't sure, and so some double-entries do remain; someone who knows those schools better should fix those.

As the edit summary says, I also removed a couple of external links that required paid subscriptions in order to view, per WP:Links to be avoided.