Most folk are using the method they use on a PC trackpad. On a phone it's a new action with a flick rather than a hold you finger and move. You may have to figure out this or another action.
I just bought an LG840G tracfone. When I scroll through my contacts it responds too quickly before I find the person I want to call. It dials someone I just touched along the way to my intended contact person.
I just tried holding my touch point without picking up my finger and retouching. That seemed to help a little.
What other clues can you give me?