
I think your dog might settle down as he gets older, but, if he is encouraged to jump up at ANYONE then you cannot rely on him maturing to solve the problem.
It is a very very common thing, especially with little dogs. They really want to be near the face of whoever they are talking too, and if thats an adult, then if you are a small dog, that a long way up!!!!!!!!!
Teach him to sit EVERY time he is to interact with a person, the only way to get ANYTHING is to sit!!!!!!! that way, he CANNOT jump up if his bum is on the floor.
Oddly enough, there are some dogs who just seem to be able to tell who they can jump at, and who they cant. My Rocky does not jump up at children (hes no saint though, his trick is to run at them barking his head off!) but he will jump at people. I dont know why he doesnt jump at children, even if they have food, or his ball, he just sits and waits, or ignores them. Very odd, since i have no children myself, nor do i know that many, but the local kids are building a den (for den read pile of tat!!!) in my garden, and one of them had their younger brother out there, must have been about 3 or 4. Anyway, Rocky saw him, and went over, child screamed as is scared of dogs, so i held his hand, and Rocky just sat in front of him!!!!!!!! totally unfazed by the sticky screaming child that he had NEVER met before (neither had i!!!!!! strange wut i find in my garden huh) Eventually, after about ten minutes, an icepop, and a bag of crisps, this little lad Morgan has decided taht Rocky is his new best friend, and wants him to come round to tea!!!!!!!!!! (Rocky politely declined, said he wanted to stay home wiht me).
So, you never can tell with dogs, 14 months is young, there is plenty of time to teach appropriate behaviour when greeting people.
Em