strange 'sort' behaviour

[Eric Stockman]

Dear ,
Six months now since I started using Ubuntu  . I have two 'trial-boot'
machines , trial-boot because both machines have 'that other OS' + feisty +
gutsy each on a separate partition. Feisty & Gutsy share  a common
home-partition .
Having problems  keeping track of the packages-installed and where I have
installed which  on what  ,  I decided  to give the machine something todo :
   - make a list of the  packages on feisty.
   - make a list of those on gutsy
   - merge both lists
   - sort the merged list in order to see what is installed and what is
missing  .
    alas it seems 'sort' is not 100% correct  ??  A bug ?
    i have appended here  (shorted) files made by method 2  as explained in
package.doc
    ubuntu.apps contains a portion of the merged file and ubuntu.sort is the
result of the sort .
  As You can see  around the apport-area the sort is faulty ?  There are
more of the same kind . ( not included )

Package: app-install-data                           feisty
Package: app-install-data                           gutsy
Package: apport                                     feisty
Package: apport-gtk                                 feisty
Package: apport-gtk                                 gutsy
Package: apport                                     gutsy
Package: appres                                     feisty
Package: appres                                     gutsy
Package: apt                                        feisty
Package: apt                                        gutsy

I can't figure out what is wrong here ?
Saluukes.
-- 
address@hidden

package.doc
Description: MS-Word document

ubuntu.apps
Description: Binary data

ubuntu.sort
Description: Binary data