pkg_info displays 2 versions of Ports, What should I do?

[Rommel B. IKEDA]

Hello,

I was reading the man page on pkg_info and then I tried testing what it 
can do...When it gave me the output, it seems that some of my installed 
ports has 2 versions...What can I do with those ports?  Can I just 
pkg_delete or make deinstall the old versions? Or do I have to do 
something before doing everything? Or just leave them alone?

Thank you for any advice in advance...
Below are the list of the ports that appear to have 2 versions:

ORBit-0.5.17_1      High-performance CORBA ORB with support for the C 
language
ORBit2-2.8.2        High-performance CORBA ORB with support for the C 
language

autoconf-2.13.000227_5 Automatically configure source code on many Un*x 
platforms
autoconf-2.53_1     Automatically configure source code on many Un*x 
platforms

automake-1.4.5_9    GNU Standards-compliant Makefile generator (legacy 
version
automake-1.5,1      GNU Standards-compliant Makefile generator

freetype-1.3.1_2    A free and portable TrueType font rendering engine
freetype2-2.1.5_1   A free and portable TrueType font rendering engine

gconf-1.0.9_6       A configuration database system for GNOME
gconf2-2.4.0.1      A configuration database system for GNOME

glib-1.2.10_10      Some useful routines of C programming (previous 
stable vers
glib-2.2.3          Some useful routines of C programming (current 
stable versi

gtk-1.2.10_10       Gimp Toolkit for X11 GUI (previous stable version)
gtk-2.2.4_1         Gimp Toolkit for X11 GUI (current stable version)

imlib-1.9.14_1      A graphic library for enlightenment package
imlib2-1.0.6_1      The next generation graphic library for 
enlightenment packa

ja-elisa10x8-1.0    X11 8-dot kanji font 'elisa font'
ja-elisa8x8-1.0     X11 8-dot kanji font 'elisa font'

libglade-0.17_2     GNOME glade library
libglade2-2.0.1_1   GNOME glade library

libtool-1.3.5_1     Generic shared library support script
libtool-1.4.3_2     Generic shared library support script

libxml-1.8.17_1     Xml parser library for GNOME
libxml2-2.6.2       Xml parser library for GNOME

mozilla-gtk2-1.5_1  The open source, standards compliant web browser
mozilla-gtk2-1.5_1,2 The open source, standards compliant web browser

Thank you againin advance...
Rommel Ikeda