My nick is Hirtz, and I play on realm 3. I bought a new shield and equipped it. When I left the screen, the shield was unequipped and overlapping other items in my bag. I could equip it just fine to my merc, and i was wondering why I couldn't equip it to myself. Eventually I removed my sword, and then I could not re-equip it. It says to equip this item you have to be at least 15 level. I am level 12. I was able to equip the shield directly from the shop, and I had already had the sword equipped and used it. The sword is bound to my hero, and has a durability of 24/40; proving I was able to equip and use it before.