I'll do my best to explain this , what I believe is a bug.

When lowering the quality of an item like going from HQ to NQ it doesn't automatically join the rest of the NQ stacks. It stays as a unique item as if it was a completely different material.

An example . I got 1 red ooid HQ and 12 red ooid NQ. Once I convert the HQ one to NQ it does not join the other 12 and even if I press sort still don't do it.

The only way to do it is to place them all into a retainer then they will all be one stack of 13.

Is this meant to be like this? Or a bug?

Cheers