well look what i found abt a-j marriage that was supposed to happen.from this article its clear that the marriage scene was shot and a-j did get married and then the whole scene was choopped off and they introduced the ridiculous twist by mr.ghatuyal and this article also says abt the grand finale
The big moment has come for Jassi in "Jassi Jaisi Koi Nahin" (Sony, Monday to Thursday, 9.30 p.m.), one of the most popular shows on television. Finally, Jassi (Mona Singh), the Plain Jane-turned-Miss beautiful married Armaan (Apurva Agnihotri) after a long separation, a gruelling court case and an attempted murder on her. Sony TV had a special wedding episode and the guest list included the channel's celebrities such as Mandira Bedi and 'Indian Idol' Abhijeet Sawant, who in true filmi style, sang a song. Neeta Lulla had designed Jassi's bridal outfit, a pink lehenga choli with an aquamarine and orange dupatta. Jassi looked ravishing in her bridal jewellery designed by Neelam Kothari and trousseau in the episode. After this much awaited marriage episode, the soap is all set for its finale.