It appears the filters or something may be pugged. I am unsure how to fix it. This problem has been occuring in the last two versions.
Basically, items that have both 245 and 258 level versions only show the 258 version.
If you open the Item Editor you can see the ilvl 245 item. However you can't equip any of these items, nor can you see them in the comparison panel.
I tried adjusting the filter to take away the heroic GToC items, and that didn't work. All of the previous ilvl 258 items are still there listed as ilvl 258.