The situation is this:
I have 2 sessions: s1.vim and s2.vim. First one was saved with files A, B, C in buffers list. Second one was saved with file A.
Next I start vim:
vim -S s1.vim.
:ls shows A, B, C. Then I source second session.
:so s2.vim. And instead of A
:ls shows A, B, C again. Why is that?