Redhat System admin Wiered user created

I created a user names apmadmin. The group name is apm admin and it is working on 10 other servers
Here is the /etc/passwd record
[collector8]root [ ~ ]# grep st2 /etc/passwd
[collector8]root [ ~ ]# grep apmadmin /etc/passwd

Now here is the group record
[collector8]root [ ~ ]# grep apmadmin /etc/group
[collector8]root [ ~ ]#

Each time I login to the apmadmin user .. You can see the prompt saying st2vodi.. I don't know this user and it does not exist in etc/passwd
[collector8]st2vodi [ /data ]$ cd /opt/CA/APM/
[collector8]st2vodi [ /opt/CA/APM ]$ ls -lai

files seem to be owned by this st2vodi...
[collector8]st2vodi [ /data ]$ ls -lai
total 5716
532494 drwx------   3 st2vodi apmadmin    4096 Jul 29 11:46 .
     2 dr-xr-xr-x. 25 root    root        4096 Jul 29 11:40 ..
532538 -rw-------   1 st2vodi apmadmin  306492 May 28 01:00
532539 -rw-------   1 st2vodi apmadmin  306924 May 28 02:00
532540 -rw-------   1 st2vodi apmadmin  304392 May 28 03:00
532541 -rw-------   1 st2vodi apmadmin  304908 May 28 04:00

I don't know how to solve this puzzle.  What is this st2vodi and why it replaces apmadmin the intended user.... Can you please help rectify the situation?
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Are you recycling user ID's?

Why are you creating a user and group separately?  If you create a user with the basic useradd command it will create a user and a group, both with share the same UID and GUID.

Maybe st2 is create by an odd character set.  Try:

grep odi /etc/passwd
EmadGirgisAuthor Commented:
Sorry late responding
[collector8]st2vodi [ ~ ]$ grep odi /etc/passwd
[collector8]st2vodi [ ~ ]$

It returns nothing.
Another point... the setup was done a long ago.. I was today working on it and observed this issue. I looked in the whole passwd file and I can see no resemblance to this user
EmadGirgisAuthor Commented:
I have went ahead and deleted the home directory
I deleted the etc/passwd record
                  the /etc/shadow
                  the /etc/group
                  the /etc/gshadow

I recreated the user and did a chown...
Now things are straighten out.

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EmadGirgisAuthor Commented:
I have not got an actual solution for what the issue it. However, the issue is resolved by removing the user and re adding it ...
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