Righteous Charge (GTC, Uncommon) is included in the search results, when using parameters Type("is one of"="Sorcery"), Rarity("is one of"="common"), Color("exclusively one of"="white").
Using Chrome Version 31.0.1650.57 m

Update: This is searching my inventory having only the uncommon Gatecrash version added.

Probably because it was printed at the Common slot in Portal 2nd Age, so the card itself exists at both Common and Uncommon.

Original post updated.

MMJuno wrote:Probably because it was printed at the Common slot in Portal 2nd Age, so the card itself exists at both Common and Uncommon.

I realize that, check update.