Test steps with 8u60b24 on win7 x64.
1. Install the 8u60 b24 32 bit offline bundle.
http://jre.us.oracle.com/java/re/jdk/8u60/promoted/all/b24/bundles/windows-i586/jre-8u60-ea-windows-i586.exe
2. Install the 8u60 b24 NEXTVER (8u61 b600) 32 bit offline bundle.
http://jre.us.oracle.com/java/re/jdk/8u60/promoted/all/RE/dummybundles/b24-promoted/NEXTVER/jre-8u61-ea-bin-b600-windows-i586-14_jul_2015.exe
3. Uninstall 8u60 from control panel or using msiexec.exe command.
4. Check the install folder of 8u60: C:\Program Files (x86)\Java\jre1.8.0_60
 
Expected:
Folder C:\Program Files (x86)\Java\jre1.8.0_60 disappears.
Registry keys HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft\Java Development Kit\1.8.0_60 are deleted.
Actual:
Folder C:\Program Files (x86)\Java\jre1.8.0_60 still exists. All files in folder still exist.
Registry keys HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft\Java Development Kit\1.8.0_60 still exist.


The same problem occurs with 9b72.
1. Install 8u60 b24 32 bit offline bundle.
2. Install 9 b72 32 bit offline bundle.
3. Uninstall 9 from control panel or using msiexec.exe command.
 
Expected:
Folder C:\Program Files (x86)\Java\jre1.9.0 disappears.
Registry keys HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft\Java Development Kit\1.9.0 are deleted.
Actual:
Folder C:\Program Files (x86)\Java\jre1.9.0 still exists. All files in folder still exist.
Registry keys HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft\Java Development Kit\1.9.0 still exist.