My artboards keep losing their X and Y.

Hi there,

I'm using illustrator to add some bits to .DWG files from AutoCAD, and then exporting them as .SVG files WITH the artboard.

However, when i open them, the artboard has changed it's X and Y from X:0 Y:0 to X:-0.5 Y:-512, the artboard is 512px by 512px.

Also I have noticed that when opening a .dwg file and scaling it on to an artboard, the Y co-ord jumps to -512, but the X stays at 0.

Is there a way to constrain these X and Y values so that they are locked at 0?

many thanks.