topas on AIX 5.3

I’m not much of Unix person, i just learn as i go and i haven’t gone far. When i run topas to see activity of the hard drives, the screen looks horrible. Nothing is lining up right, the refresh is disgusting, etc. From the prompt i’ve tried to change the session type to vt100 and vt220 and even dg, but they all look just as nasty. What else is there to try?