I don't believe that {Duj} can simultaneously be a locative with {-Daq} and the object of {jun}. Is there canon that supports this?
qIb HeHDaq, 'u' SepmeyDaq Sovbe'lu'bogh lenglu'meH He ghoSlu'bogh retlhDaq 'oHtaH
{'u' Sepmey} is the object of {Sovbe'lu'bogh} and bears the {-Daq} suffix to be a locative for another phrase in which it is embedded.
-- ghunchu'wI'