Can you please change the way you tab through field groups.
When you set up field group they list vertically. They also show vertical when you add a person, deal or company using the '+' sign. The issue is when they appear on the main screen under the deal, person or company the display is a horizontal order, left to right, top to bottom. When you tab though on those pages the tab moves vertically. So entering information or correcting information on the main screens is more difficult because it doesn't follow the order originally set up. Either change the mail screen to show vertical top to bottom, then left to right. or change the tab so it moves horizontal to match the order set up.