What is causing a misfire?

What is your question?

My 2008 Mazda 6 2.3 has recently been running rough. I have received codes P0301, P2177, P0113, P0137, P2096 & P2187. I have replaced the MAF sensor, spark plugs & the ignition coil to cylinder #1. My vehicle starts and runs fine until I drive it a ways (to a store) and turn it off. When I return (about 20 minutes later) and restart it - it runs rough, the engine light starts blinking and I receive the code P0301. Any ideas?