Ah yes, problems with Dimensions.
I started a Normal drawing, added two lines and two new layers.
First line went onto new layer 1.
Second line went onto new layer 2.
I then dimensioned both lines and these were placed on the default Dimensions layer, something TurboCAD does.
The programme tries to second-guess which layer dimensions should go on, if not the default.
I have found, if I remember correctly, that if you place the dimensions, for the most part, on one layer, say layer 6, TurboCAD thinks that's where you want all
I tend to keep dimensions on one layer only (Dims, for instance), unless I specifically require them elsewhere.
In the example above, it is a simple matter to relocate the dimension/s onto the required layer/s.