Not sure if this is just my end (most probably) but until a few days ago I could go to the NZB Index and use the filters to only search for specific file types.
Once I had done that I could then click the "Age" header and get only those selected files to show in post date order.
The past few days if I do this, as soon as I click the "Age" header all the files and not just the filter ones show up so I am sort of back at square one.
If I click on a file type on the left hand-side to ONLY "select that file type" and then click the "Age" header I notice that they do not in fact show up in date of post order - quite a few of the files are out of place.
Just thought I'd mention it in case any one else has noticed this.