quadratic residues confusion

hi

I read in this group, quadratic residues are fully multiplicative, see
http://groups.google.com/group/comp.soft-sys.math.maple/browse_thread/thread/5a47330e108d158b/13bfa08d3f0a2130?lnk=st&q=Legendre+symbol++are+multiplicative&rnum=4&hl=en#13bfa08d3f0a2130

but since Legendre symbols have values {1,-1}
does that mean if I have (-1)*(-1)=1 ==>> two non-residues multipled
together to get a residue?
strange

.