Wait a minute. You just told us it was YOUR drawing. Are you now implying that you did not create it?
According to your profile you've been using AutoCAD for the past three years yet you never heard of the GROUP command? There are at least eight groups in your drawing. They didn't just sneak in there all by themselves. Someone had to create them.
Another question. Why did you explode the hatching for 3W2?
I guess you misunderstood my question when I asked you what the "source" of the drawing was? When someone puts that question to you they are asking who created the drawing originally as we all know that drawings are frequently shared between workers in the same company and between workers of different companies. You responded twice in a row that it was your file so I naturally assumed you were the originator.