Allowing fandoms with overlapping scope is a deliberate decision that I made back before Round 1*, and is outlined here (in the "Fandoms" section). The different fandom tags specify different breadths of canon material that people want to consider relevant to the worldbuilding they are interested in requesting/offering, so it is directly relevant to the matching in a way that might not be quite so important in an exchange with a different focus.
In the specific case of Dragon Age this round, the "(Video Games)" nominator confirmed here that they wanted to limit the scope of their noms to just video game material. Although I didn't hear back from the AMT nominator specifically, it seems to me that their nominated worldbuilding tags ("Ancient Thedas", "Nevarra post-Trespasser", "Tevinter post-Trespasser") are definitely outside the main timeline of the games and information from other sources outside the main series might well be relevant, so I decided to approve it as a separate fandom, on the assumption that that was what the nominator intended. (My general principle with clarifications posts is to explain what I intend to do if I don't hear anything, and then take not hearing anything as assenting to that.)
*More generally, I decided in the very early planning stages of this exchange that it was worth trading off extra complexity in the nominations and sign up stages against the ability to have much more fine-grained matching, hopefully increasing the chances of people getting assignments they're keen to fulfil and gifts they're enthusiastic to receive. (Matching on characters in addition to worldbuilding, and having fandom-specific rather than general freeform worldbuilding tags, are also part of this philosophy.)
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timeasmymeasure
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Date: 2019-01-11 09:59 pm (UTC)In the specific case of Dragon Age this round, the "(Video Games)" nominator confirmed here that they wanted to limit the scope of their noms to just video game material. Although I didn't hear back from the AMT nominator specifically, it seems to me that their nominated worldbuilding tags ("Ancient Thedas", "Nevarra post-Trespasser", "Tevinter post-Trespasser") are definitely outside the main timeline of the games and information from other sources outside the main series might well be relevant, so I decided to approve it as a separate fandom, on the assumption that that was what the nominator intended. (My general principle with clarifications posts is to explain what I intend to do if I don't hear anything, and then take not hearing anything as assenting to that.)
*More generally, I decided in the very early planning stages of this exchange that it was worth trading off extra complexity in the nominations and sign up stages against the ability to have much more fine-grained matching, hopefully increasing the chances of people getting assignments they're keen to fulfil and gifts they're enthusiastic to receive. (Matching on characters in addition to worldbuilding, and having fandom-specific rather than general freeform worldbuilding tags, are also part of this philosophy.)