When looking at the entries in Testing, Office, Game and any other, almost all entries are duplicated.
Here is an image to show the example:
As you can see all entries are duplicated. The only ones I could see not dupe were the first ones. The first 2 or 3, after that the dupe bug appears. This even includes the Patches and Testing sections.
Apart from this bug I would like to mention that from the Testing Section I have tested in 1.5.2 and 1.5.3 under Ubuntu the following games and they work out of the box (Not even using winetricks to install anything else):
Alice: Madness Returns
Prince of Persia: Warrior Within
I mention this 2 since they are in the testing Section and maybe me mentioning that they work in 1.5.3 with no problems (Even finished warrior withing and have 45% completed Alice. Very long game actually) could help in the development of the script.
I even did a talk in a university about Wine and PlayOnLinux and how they have contributed to the migration of users to the Linux world. In the talk I have an image of Both games working perfectly. In Alice you can even play the first game version (The one that appeared first, not madness returns) with no problems.