KB2506014 not installed here, so what was the 2nd MRT for I wonder? Did yours come in on Windows Update? I just tried to install the standalone from MSFT and it said 'not applicable to your system'
Edit: Forget the above...it did come in and was installed on 21 April here. Windows search is hopeless, never found it and I almost went cross-eyed looking for it, but found it eventually.
From CNET Updates April 26th (Tuesday) :
Microsoft Windows Malicious Software Removal Tool
by roddy32 - 4/26/11 12:15 PM
File Name: windows-kb890830-v3.18.exe
Knowledge Base (KB) Articles: KB890830
Date Published: 4/26/2011
Download Size: 12.4 MB
Note:. This is an updated version of 3.18 which was released on April 12th. This extra release is due to the Win32/Afcore (Coreflood) malware.