Trouble embedding level 4 emeralds

[LittleBro_226971]

My hero has 1 lvl4 emerald and several lvl3 emeralds embedded. I try to embed another lvl4, but only lvl1,2,3 show up on the selection list. When I unembed the lvl4 then it shows 3 lvl4 emeralds, but as soon as embed 1, the selection doesn't even show lvl4. The other 2 lvl4 emeralds are still in my inventory. How can I get the other 2 lvl4 emeralds to embed?

[becalvert_1151817]

Inventory or warehouse? If they are in your warehouse they won't show. You also need to remove the jewel in the slot you want to put the lvl 4 in first by clicking on it to open the space.