Cards in a deck do not show the proper expansion symbol

When viewing my cards in my decks, the expansion symbols are all wrong. I added the Koth vs Vensor duel decks which have their own expansion symbol. I added them to my inventory first and they were added with the correct duel deck symbol, but when I added them to their respective decks, the expansion symbols are wrong - likely using the ones that the cards first released in. This makes it confusing.

By the way, I really do love this site and I've literally spent weeks adding my 12,000+ card inventory. Thanks for making this site!