PROBLEM Page Not Found Error

[ckwimberly]

My site is currently pointing to an 'under construction' index.html, however, when I go into my site directly via the admin panel or even when it was live, I am/was getting the following message repeatedly:

This is an automated message from your website...

A 'page not found' error was encountered on the sixthgrace.org domain

DETAILS:
----------------------------------------------------------------------
When: Fri Sep 26 2014 2:51:34 pm CDT
Who: 65.55.218.47
Failed Page: http://sixthgrace.org/theme/SixthGrace/c...deshow.css
Referrer: http://www.sixthgrace.org/index.php?id=come-visit-us
Browser: msie 9.0


another one:

This is an automated message from your website...

A 'page not found' error was encountered on the sixthgrace.org domain

DETAILS:
----------------------------------------------------------------------
When: Fri Sep 26 2014 7:15:57 am CDT
Who: 24.12.195.240
Failed Page: http://sixthgrace.org/theme/SixthGrace/j...wer.1.2.js
Referrer: http://sixthgrace.org/index.php?id=our-mission
Browser: safari 9537.53


Do you think that my site has been hacked or is this a real problem?

website: sixthgrace.org