This relates to 6.41B4. I have not tried on later versions yet as am still waiting for something a little more stable. But just incase it does exist.
Sequence
Using an NZB site I select the items I want
I open the file, which immediately adds them to the download list
I decide there is a little too much to come down so want to remove specific items.
I filter list on a relevant word
I create and save an NZB from the filtered items
I remove the selected items from the download list.
I open my cutom list so tab is displayed
I now load the NZB using CTRL-F which creates a new tab
I select all the items and save files to an existing custom list
I then close this new tab
My custom list shows the items have been added
The problem is the new additions are marked as Queued for download, with the blue cicle and tick preceding the entry, but they are not queued, and should not be queued!
You may also ask why the long winded way. Partly because there is no option to save selected items in the download list to a custom list, which would be a nice addition