You're not alone in that pronunciation, everyone has their own unique way of pronouncing their crypto coins/tokens depending on how they know those tickers in the first place. I might be in the main line of people who make the pronunciation for $DOGE normally, but in your case, my friend has the same pronunciation. He said why he called it Dog - E was because he thought it was an electronic dog, just like e-mail, the difference being the E at the end.