item placement guide

I wanted to decorate my house now that I fully upgraded it, so I started with wallpaper and floors but when I grabbed some wallpapers the placement guide was all messed up. I can only place items where the guide says so most rooms I can't change, the only areas where I can are where the guide...

Hello, just encountered this recently, unlike other machines like preserves jar there's no item placement guides appearing whenever I select the dehydrator in my inventory to place it on the ground. My game's at 1.6.14.4 build 24327