I will often see two line entries for a single download (the .r05 and .rar in image below):
If I close and reopen the GoG they will be combined and/or displayed correctly:
This has been an issue for a while, not related to any recent beta. But it seems to be getting a little worse lately.
How I use newsbin: I use headers almost exclusively. I open my GOGs and leave it running 24/7. GoG in question has a basic subject accept filter with two entries. I have newsbin update headers every 15 minutes.