Thanks for the replies everyone, I guess I'm feeling a little put out over it as Jax was always 'my dog' and it feels like he's blowing me off. I will look into possibly taking a training class with him soon. Any opinions if it should be basic OB or something like basic agility?
If I understand your post correctly, your dog was very comfortable with you and happy to be with you after you returned and has just now changed his attitude. I would guess that has something to do with your mood and/or the way you are training him. Avoidance and slow responses are calming behaviors. Are you feeling or acting differently lately? Is your training style different than the style your parents used? Is he is a soft dog?
Also, it's possible that he's missing your parents and what you are seeing is a little depression.
BowWowMeow, he was excited to see me when I got home, he's always excited to see someone when he's been left alone for a bit, and those times, if you ask him to sit, stay, come, down, heel, etc he works with focus and energy.(in the house). I don't know if I'm feeling or acting differently, but I will try to be more aware of my mood when I'm with him. I use the same style training as my parents, possibly with a little more positive reinforcement.
What is your training style? How do you motivate him... are you using treats or a toy for reward? Are you using corrections, or becoming stern when he doesn't obey? Or are you simply drilling the exercises over and over? It may be that he's simply not responding well to your particular style. He's not a puppy anymore, he's become an adult and may need something more to motivate him.
Some dogs naturally become more independent and less lovey-dovey as they mature.
Try doing more walks and more fetch play, and take a look at your training style and regimen.
I can't label my training style, for fear it'd be the wrong term. But when 'training', he wears a choke collar up behind his ears and is rewarded periodically (for best efforts) with treats. He will do all the basic AKC OB exercises, and has more animation if he knows you have his Kong, which he LOVES. I do collar correct if needed, but it's not often. Sometimes heeling he'll need one, but is rewarded when he's right. We'll work some on lead OB, with a small fetch/play session thrown in (30 sec-1min) and work a little more. Then if we work off lead, we'll do some, throw the ball, do a little more, then tell him to 'find it' and have a party when he does. He is a soft dog. A stern "Shame" or "Shame on you" is probably the strongest thing he gets, even his collar corrections don't have as much effect.