Map Enlaging BUGs

Put the summary of the bug you're having here
When I want to enlarge a map on crafting table, using SHIFT+Click to take the output will not enlarge the map(just waste the paper).

What I expected to happen was...:
I want to enlarge/zoom a map. And I use the SHIFT+Click to take the output for shortcut.

What actually happened was...:
The new map are not zoomed.
(And sometimes in 13w05b it will cause the new map cannot display the displayed aera in old one, but I can't reproduce it.)

Steps to Reproduce:
1. Prepare a map.
2. Put it in the Crafting Table together with 8 pieces of paper.
3. SHIFT+click the output(the new map).
4. Check the new map, it just like the old one.
....
*. If I repeat it again and again. the map can be Copied by 9.(the last screenshot shows can craft 9 maps)