There's an issue when I'm trying to combine few objects into one furniture. When I select necessary objects and go to copy and arrange tab and then try to combine selected objects (made by some extrusion bodies from furniture and objects tab) - program do combine them, but it automatically deletes some of the selected objects. So if's impossible to SAVE whole furniture made by myself, because program did not allow me to select and combine ALL selected objects into one furniture.

Is there any solution in this stupid problem? It doesn't matter weather I group object, combine/subtract/intersection them. And as I understand, it's impossible to save new furniture before making boolean operation on selected objects. Even when I choose to group elements, the program does not allow me to save it as new furniture later.

Any ideas?