I installed Essential Housing Tools, all the libraries, I installed the DecoTrack addon, I reloaded UI, I quit and restarted the game, I left homes, went back in and out again but nothing I do shows the item counts as you have left of the pictures.
@Tigerseye A great question. So when you see any portion of EHT's FX flickering like that, it is the same phenomenon as when you overlap two furnishings. The flickering is known as "Z Fighting" because the two separate polygons are literally fighting to be shown to the camera -- something that happens when the two items are equidistant from the camera (the depth or Z-index).
My suggestion would be to move the painting an additional 1 or 2 cm (the positioning tools in EHT almost all use centimeters, so that'd be 1 or 2 units) in front of the wall or any other surface it may be "Z Fighting" with. This should prevent the conflict and eliminate the flickering.