bug#14555: Facing Some problem in uniq command

[Shahid Hussain]

I have a file (named 'a')which contains following data.
"";
8003
8004
8005
8010
9040
9041
9042
8336
8336
8337
8338
8338
8339
8340
8341
9000
9216
9217
9218
9219
9220
9221
9232
9233
9234
9248
9249
9250
9251
9264
9265
9280
9296
9281
9297
9001
9226
9040
9040
15008
9041
9042
15009
15010
6169
6170
18000
18000

*************************************************
And Below is the commands i am executing along with its output with
comments.
address@hidden config]$ uniq -d a
8336
8338
//Displaying one duplicate entry But so many duplicate entries are there in
file
address@hidden config]$ uniq -D a
8336
8336
8338
8338
//Displaying only two duplicate entry But so many duplicate entries are
there in file
address@hidden config]$ uniq -c a
      1 "";
      1 8003
      1 8004
      1 8005
      1 8010
      1 9040
      1 9041
      1 9042
      2 8336
      1 8337
      2 8338
      1 8339
      1 8340
      1 8341
      1 9000
      1 9216
      1 9217
      1 9218
      1 9219
      1 9220
      1 9221
      1 9232
      1 9233
      1 9234
      1 9248
      1 9249
      1 9250
      1 9251
      1 9264
      1 9265
      1 9280
      1 9296
      1 9281
      1 9297
      1 9001
      1 9226
      1 9040
      1 9040
      1 15008
      1 9041
      1 9042
      1 15009
      1 15010
      1 6169
      1 6170
      1 18000
      1 18000
//Observe last line which is repeated with its previous line (some other
entries are also there)but uniq command not able to find it.



Please check it once and let me know if i am wrong.
Thanks and Regards,
Shahid Hussain
Bangalore.