Hello.
1) navigate to "All polls"
2) create new poll
3) post comment to this poll
4) delete posll
5) navigate to user's point history
and you can see Result:
1) user get 4 points for creating Poll (that's OK)
2) user lose 4 points for deleting Poll (that's OK)
3) user lose 2 points for deleting Stream item (that's NOT OK)

Problems:
1) users didn't get userpoints for commenting poll
2) users didn't lose userpoints for deleting comment (when poll was deleted)
3) user created poll in "All polls" section (not in Dashboard) so user didn't get points for creating "stream post". But user lose points for deleting stream post item when poll is deleted

Thanks.