If multiple packages share the same repo, s-l-r just gets saved rev of the first one and either rebuilds all of them or none. It should get saved rev off every package and compare them with a common 'current rev'. It may be a good idea to add branch spec to grouping key.
[master cdb3a02] Don't join packages sharing the same repo. 2 files changed, 2 insertions(+), 23 deletions(-)
Fixed in 1.2.