Some gadgets are not properly aligned in a Dashboard page

STEPS TO REPRODUCE

1. Go to Dashboard.WebHome page
2. Edit the page in Inline form mode
3. Add a 'Box' Gadget with some content under 'Activity Stream'
4. Click 'Save & View'
5. Add another gadget (e.g. 'Info Message') under 'Box' Gadget
6. Click 'Save & View'

EXPECTED RESULTS

The 'Box' Gadget is properly aligned in column, being displayed below 'Activity Stream' Gadget. Also, the 'Info Message' Gadget is displayed under 'Box' Gadget.

ACTUAL RESULTS

The 'Box' Gadget is displayed compressed in the right side on the 'Activity Stream' Gadget. If another gadget is added (e.g. 'Info Message'), it's also displayed misaligned: a part of it's title is displayed below the 'Box' Gadget and the message box is longer than the column's width.