TYPO3 Core

When I use an alias in a CONTENT object with SQL debugging in de back-end, the previewpage always shows a mySQL error saying there's an Unknown column '[my defined alias]' in 'field list'. When I checkout the error message, it's plain to see that the mySQL statement is missing the 'left join' and the 'as' parameters.

Everything works fine in the front-end. A deliberate typo in the selectFields shows a correct SQL statement with 'left join' and 'as', like there should be.

hope anyone can help me:
my typoscript can be found here: http://pastebin.com/embed_iframe.php?i=78AXr3tt

preview page:
ERROR
Unknown column 'plo_title' in 'field list'

lastBuiltQuery
SELECT title,nav_title,plo_title,plo_nav_title FROM pages WHERE pid=-1 AND t3ver_oid=0 AND t3ver_wsid=6 AND pages.deleted=0
---------------------------------------------------------------------

front-end
ERROR
Unknown column 'deliberateTypo' in 'field list'

SELECT deliberateTypo, pages.title as title, pages.nav_title as nav_title, plo.title as plo_title, plo.nav_title as plo_nav_title FROM pages LEFT OUTER JOIN pages_language_overlay plo on (pages.uid = plo.pid) WHERE pages.pid IN (92) AND pages.uid =54 AND pages.deleted=0 AND pages.hidden=0 AND pages.starttime<=1290517380 AND (pages.endtime=0 OR pages.endtime>1290517380) AND NOT pages.t3ver_state>0 AND pages.doktype<200 AND (pages.fe_group='' OR pages.fe_group IS NULL OR pages.fe_group='0' OR (pages.fe_group LIKE '%,0,%' OR pages.fe_group LIKE '0,%' OR pages.fe_group LIKE '%,0' OR pages.fe_group='0') OR (pages.fe_group LIKE '%,-1,%' OR pages.fe_group LIKE '-1,%' OR pages.fe_group LIKE '%,-1' OR pages.fe_group='-1')) LIMIT 1

(issue imported from #M16529)