Select Link objects - flooding over to the rest of the mesh

[Flashheart8]

I have tried separating my objects using seams.
However, when I try to select objects using L most of the rest of the orc mesh is selected.
I went over my mesh many times looking for leaks but I haven’t found any.

My workaround is perhaps the select parts of the mesh I wish to look at (say the head), and separate them by parts.

Is there any problems when I do this?

Thanks

[NP5]

You need to use the pop up box shown below and select ‘seam’ for L to select by seam.
That would be my guess with no images to see at what is the problem.