Actually, historically it is not wrong, since there was a time that Zulaikha had a crush on Joseph, while Jacob was in Kan'aan and he was blind. But, what matters the most for poet, is the concept that he wants to say, and historical accuracies have not the first order of importanceIf we go by your explanation, it would make more sense literally but not historically.
Btw what is the meaning of ush and kund ???
![Wink ;) ;)](/styles/default/xenforo/smilies/wink.gif)
BTW, Kund >> Konad which means "it does"
Ush? where did you see this word?