Excel forms in CorelDRAW unstable

Hi everyone! It's really not that important, but I just want to share. Just in case we might try to fix this. I've created a personalized invoice form in wich I integrated a Microsoft Excel from to it. Ever since the version I intergrated my Excel forms it has always been an issue. When I integrate a Microsoft Excel form in CorelDRAW and apply changes to it, the form doesn't retain its size and emplacement. The change VERY slightly, but still ALWAYS change. Do you understand me?