After Saving Bobcad adds double layers

[Jaked937]

I have been doing a lot of monogram style signs that I make in Bobcad. If I draw the monogram and save it and then immediately open the file in Sheetcam all is well. If I save the file and come back to it later Bobcad will have added another layer to the whole drawing which I have to go through and delete. Its not the end of the world but it is frustrating. When I select all and use the "erase doubles" feature, it does nothing. I have never had that feature work. Why is Bobcad adding other lines to a previously good dxf file? I have had this happen to multiple styles of designs.

Also while I'm here, when doing the monograms I cant get the 2D boolean feature to work either. I select one color, hit the space bar, select the other color and hit the space bar, and nothing happens. I followed Al's video he posted here exactly and it wont work. Recently when I try it just crashes the whole program and I lose what I have drawn.

Any suggestions or help would be appreciated!