I don't know if coming to see one girl and asking for naother is right or wrong.. but it a serial.. and just they show it the way they want ot move the serial.. Moreover, as far as I have seen, other girls will not be allowed to come with the girl in the ponnupakara scene. not even the girls' own sister.. it is to avoid such confusions...
So in the serial they make it the way they feel to start the probs.. Serial is aka probs..
Hope Joshyar would have said everything to kalyani.. Or kalyani will say that they see marriage date alone and not matching.. They wil be married anyway na.. only after that actula serial starts na.. this before arriage scenes i hope is intro to each person and their character and the expected probs..