portversion not working ?

[RJ45]

when I run portversion -v to check against current pacakges installed and
the up to date versions many packages are reported as up to date but there
is a new versio nin hte ports avaliable.
this happened for example with freetype.

I had

freetype2-2.1.5_2  =  up-to-date with port

i did a portupgrade freetype2-2.1.5_2

and the result now is

freetype2-2.1.7_2           >  succeeds port (port has 2.1.5_2)


anyone has some hint for me?

thanks

Rick