If it is a subfolder of a Mesh folder, it will not be a blue Mesh fodler icon, since it lives within the top level Mesh folder - it is an object within the Mesh folder.
The top level folder should be the blue icon.
I suspect that the folder that isn't synchronizing is a file type that is excluded from sync - since it is owned by Expression, it may be something that Live Mesh cannot sync.
There should be a right click menu for the notifier in Windows 7, so you've got two unique issues, with the non-synchronizing folder being perhaps by design. If you could file two bug reports on Connect for these issues, that would be great.
Instructions can be found here;
How to Submit Bugs and Live Mesh Logs
-steve
Microsoft MVP Windows Live / Windows Live OneCare & Live Mesh Forum Moderator