Sword plant questions (shedding?, how to trim)

I have what I am 99% sure is are Amazon sword plants. Today I was inspecting
them closely as I was figuring out what to do with (how to trim) what
appeared to be leaves so long that they were to the top of the tank and ran
along the length of the tank. I found that these weren't attached to the
base of the plant, but appeared to be shed from the plant. These leaves
appear to be quite healthy. I'm wondering if this is normal, or if there is
some explanation for why this happened. I have a few corys, a pl3c0, and
tons of snails.

Also, since some of my leaves are about twice the height of the tank, I
think they should be trimmed for aesthetics and allow the rest to get light.
Some people say its ok to trim the leaves, other people say only to cut near
base. I'd like to here more before I do anything. Also if trimming at base,
do you guys uproot or do deep sea surgery?

I'm under the impression that the shed or trimmed sword plants leaves will
not root if replanted, am I correct? Is there anything useful I can do with
these and other trimmings (other than share replantables). Perhaps making a
veggie shake for my pl3c0? Chopping them up and putting them into the feed
bag I strap onto the pl3c0? Obviously I'm not serious about these ideas, but
it seems like there should be some useful I can do with this stuff.

Thanks for any help.