yanking into body text ends up after the entry

[Samuel Wales]

imagine this

***** to yank
a
b
c
***** x
^sadfsadf
^^******* y

if i kill the to yank entry, then paste at ^,it ends up at ^^ instead.
this is logical in that to yank would swallow the body text, but i am
wondering when this behavior started.

when i kill to yank as a shortcut for moving its body text, my
intention is to kill the header afterward. and so the behavior, is
surprising.  idk a command for "kill header and copy body".

if that makes any sense.