Just making a thread here in the oGear section.
https://solidice.com/forums/1/topic/ogear-displaying-the-wrong-gear-item-level-in-heroic-raids
"Seems to be that all items you loot post 6.0.2, in quality HC and Mythic will be shown by oGear as ilvl 540. All items I have that were looted pre 6.0.2 shows correct ilvl 553 or 566. Warforged items also showing as 540"