Family reunion quest strange bug

[SHTMSTR]

I actually completed the quest but it was strange. So While the quest was active I was unable to put Vasco in my party. The strange part was that I could keep doing the quest, and I had Petrus and Siora in my party and Vasco kept speaking his dialogue lines like he was there. Well at least eh subtitle would appear but his audio would not play. The NPC's and De Sardet reacted like he said them, BUT HE WAS CHILLING AT THE APARTMENT! Lolz, strange bug but not that big a deal because I could complete it! Just thought I would let you know! I love the game ALOT. Thanks for putting it out and on sale!