problem scroll global variables if are too

Hi for all people: i have un problem with the visualization the global variables in block editor --> if i use too variable they don't scroll e i don't have the possibility the selection (those are beyond the screen e don't are visible).
I have firefox 33.01 : it's common problem or i am the one with this?

this is a known issue

use typeblocking http://appinventor.mit.edu/explore/tips.html

or store your values in a list instead How to work with Lists by Saj