Seeing PHP info twice in status report
This is perfectly normal.
Every module you have enabled declares its own set of requirements. In your case, it seems that one module requires a version of PHP greater than the Drupal 7 default minimum PHP version of 5.2.4. Because of this, you will see two entries in the status report:
The first entry shows you what version of PHP you are using. This is always present.
The second entry shows you a status message from one of your enabled modules. This also shows you the version of PHP you are using, but in a slightly different format. This is only present if you have a module that checks the PHP version in hook_requirements().
If you want to find out which module you are using requires a non-standard PHP version, search your modules directory for hook_requirements. This is usually found in the &lt;modulename&gt;.install file for the module.
You will commonly see multiple entries for a variety of things. In my experience, the most common (in Drupal 7) is for cURL support - many modules require cURL, so you may see two, three, four or even more lines in the status report that tell you cURL is enabled. Again, perfectly normal.