Thanks. I will play around in the DB to see if I can figure it out. I do have a test install on my PC, so I just wiped out the Kodi userdata folder, and it did come through correctly when I rebuilt it, so clearly you guys are right on the issue. If I can figure it out, then I can fix it on my shields.
Took a chance and renamed the textures13.db since my only content comes from Npvr and my media server, and it worked great. Kodi simply rebuilt the db with the new images. Thanks again for the info.