to remove *** Some devices missing

#! http://pastebin.com/359EtZQX
Hi, I'm scratching my head and searched in vain to remove *** Some devices missing.  Can anyone help give me a clue to clean this up?
- is there a good way to 'fix' the artifacts I am seeing? trying: scrub, balance.  Try: resize, defragment.
- would I be advised to move to a new clean volume set?
- would a fix via a btrfs send/recieve be safe from propogating errors?
- or (more painfully) rsync to a clean volume?

It seems as though my earlier add / removes all completed ok with  the *** message left as an artifact.  The history is that two inodes were corrupted and those files were deleted, then a failure occured as reported on http://stackoverflow.com/questions/33432704, that then resolved itself after a later reboot, now I cannot get rid of *** missing

# btrfs fi sho
Label: none  uuid: ec3fb67c-41c2-4920-b67c-3d3b6451a1ee
        Total devices 3 FS bytes used 1.94TiB
        devid    6 size 2.46TiB used 1.98TiB path /dev/mapper/26d2e367-65ea-47ad-b298-d5c495a33efe
        devid    7 size 2.46TiB used 1.98TiB path /dev/mapper/3c193018-5956-4637-9ec2-dd5e49a4a412
        *** Some devices missing
#

# btrfs-find-root /dev/disk/by-uuid/ec3fb67c-41c2-4920-b67c-3d3b6451a1ee
Superblock thinks the generation is 103167
Superblock thinks the level is 1
Found tree root at 9314617421824 gen 103167 level 1
Well block 9314617020416(gen: 103166 level: 1) seems good, but generation/level doesn't match, want gen: 103167 level: 1
^C
#

# btrfs-find-root /dev/disk/by-uuid/ec3fb67c-41c2-4920-b67c-3d3b6451a1ee | grep Well -c
107
#

# btrfs check /dev/disk/by-uuid/ec3fb67c-41c2-4920-b67c-3d3b6451a1ee
Checking filesystem on /dev/disk/by-uuid/ec3fb67c-41c2-4920-b67c-3d3b6451a1ee
UUID: ec3fb67c-41c2-4920-b67c-3d3b6451a1ee
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
found 2132947718159 bytes used err is 0
total csum bytes: 2077137756
total tree bytes: 6006943744
total fs tree bytes: 3496992768
total extent tree bytes: 256516096
btree space waste bytes: 1004100187
file data blocks allocated: 3781274017792
 referenced 3754384625664
btrfs-progs v4.2.2
#

# btrfs version
btrfs-progs v4.2.2
#

# uname -a
Linux Vine 4.2.0-1-amd64 #1 SMP Debian 4.2.3-2 (2015-10-14) x86_64 GNU/Linux
#

# for id in 1 2 3 4 5 8 9 10; do btrfs dev del $id /mnt/ec3 ; done
ERROR: 1 is not a block device
ERROR: 2 is not a block device
ERROR: 3 is not a block device
ERROR: 4 is not a block device
ERROR: 5 is not a block device
ERROR: 8 is not a block device
ERROR: 9 is not a block device
ERROR: 10 is not a block device