Ah I see, thank you! Great mod like all the others.

The second candle will just tell you there is already a ritual in progress if you try to use another candle without resolving all the way

Is it possible to burn one species candle, recycle the species you want, then burn an element cancel, recycle the element you want = to get exactly the bootleg you want?

Or will the second candle just overwrite the first?

Make sure you've actually run the game with mods enabled. You should get a prompt when launching the game that asks if you want to use mods. Any mods that successfully load will be listed on the title screen

I have the mod but the candles do not apear in the shop

There seems to be a bug in the element ritual candle that lets you use it on the next two fusion encounters instead of just one.