Parent term taging

Hi.
Unfortunately it's not possible to store multiple values with Simple hierarchical select (as done by Hierarchical select for example).

Why exactly do you need the parent? Only for display purposes?
Simple hierarchical select comes with a display formatter (see "Manage Display" next to your content types field configuration) that outputs the lineage of the selected term.
Say you have this hierarchy:

- parent 1
-- child 1.1
-- child 1.2
-- child 1.3
--- grandchild 1.3.1
--- grandchild 1.3.2
- parent 2
-- child 2.1
-- child 2.2

If you select "grandchild 1.3.1" the formatter will output "parent 1 > child 1.3 > grandchild 1.3.1".

Maybe this helps you somehow ...

Ah ok.
This would be possible by replacing the term pages with Views and using the (exposed) filter "Content: Has taxonomy terms (with depth)".
With this filter (using my example from above) you'll get all nodes tagged with "parent 2", "child 2.1" and "child 2.2" after setting the filter to "parent 2" or calling the page for "parent 2".

Does this help?

The filter I've mentioned will display a list of all terms of the selected vocabulary (even as hierarchical list if you want). This way you can switch to each single term page.