After you create the album and the software automatically organizes the files, simply press CTRL + Z. It might not be a step caused by the user's intervention, but it will work.
However, I have found that this is a known issue. No matter the approach, Picasa will auto-arrange items as it pleases. There is a solution.
Use your files and then rename them using a template.
For example, open a directory on left and another one on right in Windows. Drag one image from left to right and assign something like: Picture_1, Picture_2, etc. If you have the photos in order, Picasa will not sort them automatically.