http://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2015/ENU/Maya/files/GUID-8139C5B1-3C37-43DF-965E-39800AA98EE2-htm.html
This will teach you about how to use the Namespace Editor. If you want to do anything with rigging, you’re going to need to know, understand, and learn how to work with namespaces and why they’re useful.
I guess this forum doesn’t have a collapse tag. In the future: pastebin.com for walls of text. You can even set it to expire within a time period. Completely free.
Borderstyle is a property of frameLayout(and I think a few others like formLayout, etc.). It will be removed in the next version. Autodesk usually does this so people’s User Interfaces do not stop working and this gives them a year to adjust their changes. Whenever Version 2 is released, it won’t be based on Autodesk’s ever changing UI specifications. This doesn’t matter for now.
**# Warning: Object, ‘spine_splineIK_bottom_joint’, skipped. It is already a child of the parent, ‘world’. #
**This seems like you may have accidentally unparented this joint. I don’t recall this joint being in the world space.
As for the container being locked - it’s a little hard to know without seeing it.
Are you importing one rig into the same namespace as another rig? That’s what it seems like you’re doing and if you’re doing that and they’re based off of the same modular rigging system, the joints will clash and therefore go straight up Limp Bizkit and break stuff.