Jack's uncle tells him that he is his favorite nephew. Jack responds I'm your only nephew. Then there is the episode where Jack's brother visits and takes out Chrissy. :confused:

Yeah, I guess that's one minor technicality the writers overlooked :D

Yes, I noticed that too. Things like that happen in every show.

Either the show forgot about what Jack said in this episode or they had Jack hate his brother so much that he acted like he never existed

Jack's uncle tells him that he is his favorite nephew. Jack responds I'm your only nephew. Then there is the episode where Jack's brother visits and takes out Chrissy. :confused:

And then there was Jack's other brother --> "Austin" ! ;)