snappy update is not updating snappy-debug

I have the snappy-debug 0.2 snap installed on latest stable and edge, but it isn't updating. Installing works fine.

$ snappy list|grep debug
snappy-debug 2015-10-19 0.2 canonical

$ sudo snappy update
$

$ snappy list|grep debug
snappy-debug 2015-10-19 0.2 canonical

$ snappy search snappy-debug|grep debug
snappy-debug 0.3 snappy-debug

$ snappy list -u
Name Date Version
ubuntu-core 2015-10-23 9
snappy-debug 2015-10-19 0.2
generic-amd64 2015-09-30 1.4

$ cat /var/lib/snappy/meta/snappy-debug.canonical_0.2.manifest
alias: snappy-debug
anondownloadurl: https://public.apps.ubuntu.com/anon/download/canonical/snappy-debug.canonical/snappy-debug.canonical_0.2_all.snap
downloadsha512: 22b2becdb8a9e48faf014c2b670be6a3c4fd38b3eb367b45e93d23e2123b0b869721d5b03bf5d5b4c49722820d8951a1e51a03d5554b282ba117084fb81e639c
description: |-
  Debug tools for ubuntu-core
  Useful debug tools:- gdb- strace- ltrace- valgrind- snappy-security
downloadsize: 8813
downloadurl: https://public.apps.ubuntu.com/download/canonical/snappy-debug.canonical/snappy-debug.canonical_0.2_all.snap
iconurl: https://myapps.developer.ubuntu.com/site_media/appmedia/2015/10/hello_2.png
lastupdated: 2015-10-19T16:24:00.676785Z
name: snappy-debug
origin: canonical
prices: {}
publisher: Canonical
ratingsaverage: 0
supporturl: mailto:<email address hidden>
title: snappy-debug
type: app
version: "0.2"

snappy-debug does have a store alias (snappy-debug) and it is not a framework.