Barboutre Excalibur doesn't apply masks, this is API limitation.
Regarding Cauldron:
Did you drop group of clips or just one clip one by one?
If you want to get all versions from 10 clips, you need to drop 10 groups of clips (it could be a bin with 10 clips inside) 10 times on Cauldron timeline.
Then you will get 10x10=100 sequences.
If it is not helpful, please record a video of your screen and show how you drop items onto Cauldron timeline.