Question Posting Admin Email in the forum caused Site template to messed up?

Hi all,
This is weird and every odd but it has happened twice already and I have tested several times on my site. When the admin email that I used in the Joomla configuration is posted in the forum, the whole site template messed up (I used Beez 20) and anybody in the same group has the same problem. For example, if I posted in the forum that is for Administrator group, everybody in that group has problem and other users do not have problem.

Anybody has seen this before. I know it is very weird but want to see if anybody has any similar problem or know anything about this?

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Joomla default template details : beez_20 | author: Angie Radtke | version: 1.7.0 | creationdate: 25 November 2009

Kunena default template details : Blue Eagle (default) | author: Kunena Team | version: 1.7.1 | creationdate: 2011-11-16

Kunena version detailled: Installed version: 1.7.1 | Build: 5162 | Version name: UnderUret | Kunena detailled configuration:

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[th]Kunena config settings:[/th]

board_offline	0
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category_subscriptions	post
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email_recipient_privacy	bcc
email_visible_address
captcha_post_limit	0

Third-party components: Jomsocial 2.4.1

Third-party SEF components: None

Plugins: System - Mootools Upgrade: Disabled | System - Mootools12: Disabled | My Kunena Forum Menu 1.7.1 | My Kunena Forum Posts 1.7.1

Modules: Kunena Latest 1.7.1

Can you give an example?

I use [email protected] for the site configuration and whenever the whole email [email protected] posted in the forum, it affects the site template - not just the forum but the whole site. Again I am not sure if that is the cause but it happens every time when that email is posted in the forum and when that email is removed it fixes the problem. Thanks for checking.