There is some strange behavior to observe in the current version of NetRW shipped with Debian Jessie (current as of Mid-2015) on my installation. Searching online doesn't immediately reveal other reports, or a known bug/existing patch. I'm currently not yet excluding my environments, or that this is documented behavior. Haven't found that yet though.
When I attempt to open 2 or more files with vim on different remote servers, only the first one gets opened successfully, concerning the other(s) I get a [New Directory] message. I switch command-line parameter sequence, the other one opens successfully.
vim scp://host1/filepath1 scp://host2/otherfilepath2
==> First file opens, but second file is blank
vim scp://host2/otherfilepath2 scp://host1/filepath1
==> Behavior consistent: Opening other files than first fails.
On top of it, both fail, if I also specify a local file first:
vim local/fi.le scp://host2/otherfilepath2 scp://host1/filepath1
Following variant at least opens the first scp-file and the local file:
vim scp://host2/otherfilepath2 local/fi.le scp://host1/filepath1
Running with all local customizations disabled as described in detail here:
vim -u NONE -U NONE -N scp... creates buffers for all files, but all remote file buffers are empty.