If you goto the above post you will see that there are some comments which when posted appears as admin comments for some reason.
If you are having problem finding that specific comment you can also press CTRL+F to find it using the following words Test Comment or Guest which i posted myself for testing purpose to show it here.
The problem is that its making guest users comment appear as Admin Comments by putting that ADMIN Image at the right of the comments. and the odd thing is this is only happening if the user replies to an admin comment :o
Can someone please help and tell me what could be causing this behavior? i'm pretty new to wordpress theme development :(
Thanks in advance.