They were either not programmed the same or are programmed for repeater channels and without the repeater, they won't talk to each other. That is, unless one of the buttons is programmed for talk-around. Either way, they'll need to be reprogrammed to properly licensed frequencies if you want to be legit.
Are they VHF or UHF? They could technically be programmed to MURS if VHF (license free but with certain restrictions) or GMRS (license needed though) if UHF.
How many radios can one man own? Don't ask stupid questions.