Hi Elvissuperstar007,
The problem comes from Resource Collector, that only collect standard Bitmap, and not other assets.
It is the same problem with the tool "Collect Asset" ..
That seems to be a bug / limitation of those tools.
In your video, it collect 1_one.png because you use it as a standard Bitmap, connected to the 'Standard texture' button of the RGB image.
But it doesn't collect 2_two.png because it is directly specified as the 'filename' of the Grayscale image
To collect all the asset into a zip file, for sharing with others, it is best to use the standard
File / Archive... option.
You can check and see all the assets that will be included with the File / Reference / Asset tracking dialog..
All the Octane assets are correctly recognized.
You can also check and view all the scene assets with the Octane tool in Render settings / Tools / Octane Preferences / 'Open Asset Explorer' button.
This also list the items that use the assets, and also search and relocate assets if they are not found.
viewtopic.php?f=27&t=84035&p=435361
Note that using the 'Standard texture' is not a very good solution because it loose / change the quality as it will be baked with the bake resolution specified in the 'Bake input resolution' parameter...