[Mitgcm-support] ecco-branch question?

[mitgcm-support at dev.mitgcm.org]

Clicking on the revision graph it looks like there are changes on
"ecco-branch" that sound like they should be on the main branch e.g.

untagged
o Modifications to pkg/seaice, verification/lab_sea, and
  verification/natl_box_adjoint for testing sea-ice adjoint code.

Is this normal? Isn't it supposed to work the other way i.e. these
changes initially go in the main branch and then get merged into the
ecco branch? Or is there a two way thing going on. 

Thanks,

Chris