Did you mean to override the frame here to the red-black hybrid frame? This kind of land normally has the land frame with red-black background - it should look like Rakdos Guildgate rather than Rakdos Cackler. And Multiverse should automatically detect that for you: if you set "Colour" back to "Auto" rather than overriding it, Multiverse will fill in the colour correctly once you've typed the word "Land" on the type bar and " or " into the text box.