When you described the case, you said that he was served someplace he never lived. The case says he admits he lived at that address. He was served by first class mail and the sheriff also left a copy with a woman who would not give her name but said she was his sister.
He was served, did nothing, and they took a default. The law gave him six months to reopen the case and he did nothing.
Even so, six years later, he moved to set it aside and won.
His first appeal which I didn't post on here he stated he was not living at the address and had not, if that changed during the appeal with the 2nd circuit I'm not sure why.
There should not be a time limit for a man to contest paternity, especially when there is no time limit on women to establish paternity. Also, many men, especially in marriages, do not find out the children they believed were theirs are in fact not their biological children.
Why in those cases should the real bio-father get off the hook from supporting the children they helped to produce?