Can we fix the title so it doesn't say "Sonic the Hedgehog (2006) (2006)"?

Short answer: no

Long answer: The new site update forces the year of release to be shown with the game title, which is horrible for this game. If this game was renamed to "Sonic the Hedgehog" (Currently the game's name is set to "Sonic the Hedgehog (2006)") it will conflict with the original game on the Sega Genesis. If this game was renamed to anything else, it wouldnt be the official game's name.

Yeah I wish we could...