Two bugs associated with where new ships appear after construction.
1: Captain David D. Porter and the USS Cairo river ironclad appeared at Chicago on Lake Michigan, effectively trapping it for the entire game.
I guess that the Reb's had taking all the other possible Illinios deployment sites. Which is possible because I was using this campaign to test Eastern strategies and left the West completely unattended. Although I don't think they had taken Cairo. This was many turns ago, so I would have to dig to find the saved turn.
2: I commissioned 5 Sea Transports for construction in PA. 3 were built in Philladelphia. The other 2 in Pittsburgh! I think Philly and Montgomery should be the two PA entry points for sea going ships. Just for fun I sent them down the Ohio and Mississippi, two turns later they emerged into the Gulf!!
3: In the Ship tab of Reinforcements screen, the bottom row of buildable ships obscures the cost/price text.