120 pixels width is kinda small for the log-in form field and text,  this why you'll find a difference between  the to modes!

It is recommended that you use around 160 pixel side blocks, 150 may even work but the point is that the user info once logged in is much smaller than when not.

for more information on setting up your blocks, please check this area:
http://www.ezportal.com/how-to-ezportal/

Please note that you may also change the theme wrapper size to accommodate larger block widths!

also on the ezblock recent post you may remove the "ezblock", and name it "Recent posts"

regards,
Maxx