I have had selected objects at least appear to be on two separate Layers (that's what the check mark tells us).
There have been two ways for this to happen that I have noticed. One is when TurboCAD's internal bookkeeping is munged; the solution is to save, close and re-open the file (if that doesn't work, then the Built-In Folder has to be deleted). The other is when the object has been Grouped or Blocked and the component items were on different Layers when that happened. I try to make sure that doesn't happen my moving all objects to Layer 0 before Grouping them or making a Block item.
TC Pro Platinum 2020, 2019, 2018, 2017, 2016 & 2015 (all with LightWorks & RedSDK) & V21
System: i7-5820K @ 3.30GHz, ASRock X99 Extreme4, 16GB DDR4-2133 RAM, Gigabyte GTX 970, Samsung NVMe SSD 950 (256GB), Windows 7 Pro (64-bit) SP1