Easiest check you can make would be to shortcut Tx and Rx lines to see if it is a PSoC SCB UART problem. Can you post your complete project, so that we all can have a look at all of your settings? To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file.
Thanks for the suggestion Bob. I hooked up a loopback and verified that the PSoC 4 SCB UART, and all code is working properly! I'm going to dig out a logic analyzer and verify that the KitProg USB to TTL Serial is working properly, and also verify that an app i'm running on a PC is properly transmitting 8-bit data. I know the app is properly receiving data from the PSoC, but i'm not 100% sure it's transmitting properly.