Title of this game may be wrong?

It seems the title of this game shouldn't include "Extended Edition" when it includes "Extended Edition" as a DLC as well, which has additional achievements locked off behind it. Either the Extended Edition needs to be added as it's own game in the database including all the achievements, or the title of this game needs to have "Extended Edition" removed, otherwise it's nonsensical and confusing.

We use the Steam store page for the title of each game. The one we currently have currently matches the store page.

As for the DLC, the only DLC I can see for this game is the Deluxe Upgrade which includes just the soundtrack and an art book.

Go back and have another look on the page for the game here on TrueSteamAchievements, there are 2 DLC sets, one for the said Deluxe Upgrade, and the other for "Extended Edition", which doesn't make any sense at all. The Extended Edition wasn't a DLC package for the original game, it was an additional release that replaced the original version. So having 16 achievements locked off under the non-existent (but very much present) Extended Edition DLC makes no sense

So then logically there are two options: those 16 achievements should go with the rest of them for the game, or the game title should be renamed. Since you say you go off of the name of the game on the Steam store, the name can't be changed. So there is but one thing that needs to be done, which is to remove the imaginary EE DLC, and move those achievements.