Git commit behaving strangely

[Zeeshan Qureshi <zeeshan@zqureshi.in>]

Hello,

I am new to git and was going through gittutorial-2 when i noticed 
something weird.

1. I first create a file file.txt with some text and committed it.
2. I create a file called closing.txt with some text and committed it.
3. then i added 1 new line to both closing.txt and file.txt
4. i added the file closing.txt to the staging are by running 'git add 
closing.txt'
5. now i ran 'git checkout' (by mistake)
6. Now i run 'git diff --cached' (which should show the changes i have 
in the index), the output is this

diff --git a/closing.txt b/closing.txt
index da55920..953ec3a 100644
--- a/closing.txt
+++ b/closing.txt
@@ -1 +1,2 @@
  closing
+again?

7. Now when i run 'git commit -m "closing again"', the change is not 
committed even though i get a new commit id.

The output of 'git log -p' is this (as you can clearly see, there are 
new commits but no change has been recorded)

commit 7dbe9a272c58decc08f9fd5ce07efd5bf28d89f8
Author: Zeeshan Qureshi <{email}>
Date:   Tue Jul 20 15:36:05 2010 -0400

     closing again

commit 1bfda310eb82e62925b28d62e98097d6fbd61620
Author: Zeeshan Qureshi <{email}>
Date:   Tue Jul 20 15:34:46 2010 -0400

     closing again

commit 3d0e35717bea56adbc7c578b3b17db3657e30040
Author: Zeeshan Qureshi <{email}>
Date:   Tue Jul 20 15:33:40 2010 -0400

     closing

diff --git a/closing.txt b/closing.txt
new file mode 100644
index 0000000..da55920
--- /dev/null
+++ b/closing.txt
@@ -0,0 +1 @@
+closing

commit 2a0a0e4edb1810b6e31b0739bd7736d1360e6d13
Author: Zeeshan Qureshi <{email}>
Date:   Tue Jul 20 15:32:13 2010 -0400

     initial commit

diff --git a/file.txt b/file.txt
new file mode 100644
index 0000000..3b18e51
--- /dev/null
+++ b/file.txt
@@ -0,0 +1 @@
+hello world


-- 
Zeeshan Qureshi
zeeshan@zqureshi.in