From Dukes Readme:
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Resurrection Target Gets Stuck In The ground
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Any Mod that makes a custom resurrection spell and forgets to use the Keyword "MagicSummonUndead" in the spell Magic effect will cause this incompatibility. If you get this bug you need to talk to the moder that made the spell and ask him to fix his oversight.
I'm not very experienced with the CK, but I can make basic items and edits and such. Basically I was wondering if anyone could point me in the right direction to applying this fix? It doesn't sound too hard.
I messaged the creator of the Belua mod, but he doesn't seem very active these days.