Wrong SQL when using multiple search fields

I considered reopening Wrong SQL query when submitting multiple values., but thought a new bug might be more beneficial.

I am using the Autocomple textfield element with the Node.Title and Node.Body fields selected for search.

With a delimited value as a space.

Under the submitted values section, I have selected:
Multiple field result combination: Disjunction (OR)
Multiple value result combination: Conjunction. (AND)

Issue:
When I type in a query with multiple values. "question test" for example.

Actual Result:
I am getting results which have either "question" or "test" in either the Body or the Title

When viewing the query, if I set the Multiple field result combination and Multiple value result combination respectively, I am getting the following SQL results:

OR OR

WHERE ((node.type IN ('%s','%s','%s') AND ((node.title LIKE '%%%s%%' OR node_revisions.body LIKE '%%%s%%' OR node.title LIKE '%%%s%%' OR node_revisions.body LIKE '%%%s%%')))) AND node.status = 1 GROUP BY nhier.group_id

OR AND

WHERE ((node.type IN ('%s','%s','%s') AND ((node.title LIKE '%%%s%%' OR node_revisions.body LIKE '%%%s%%' OR node.title LIKE '%%%s%%' OR node_revisions.body LIKE '%%%s%%')))) AND node.status = 1 GROUP BY nhier.group_id

AND AND

WHERE ((node.type IN ('%s','%s','%s') AND ((node.title LIKE '%%%s%%' AND node_revisions.body LIKE '%%%s%%' AND node.title LIKE '%%%s%%' AND node_revisions.body LIKE '%%%s%%')))) AND node.status = 1 GROUP BY nhier.group_id

Expected Result:
For the main scenerio I described above (OR AND), shouldn't I be expecting to see results in which either the Title or the Body has both "question" and "test" in the results. like:


(node.title LIKE '%%%s%%' AND node.title LIKE '%%%s%%') OR (node_revisions.body LIKE '%%%s%%' OR node_revisions.body LIKE '%%%s%%')