Two versions of the same extension side by side.

Hello,

I have the following situation. Two different versions of the same extension are deployed in two different locations. The extensions are loaded correctly, no collision warning are present in the log file.  The assemblies for each extension have different version.

The problem is that no matter which version of the extension I use, the assemblies with the latest version are loaded. I could determine this by using the following code. 

System.Reflection.Assembly asm = System.Reflection.Assembly.GetExecutingAssembly();

Can anyone explain why is this happening. How are the assemblies loaded.

Thanks