Looks like we'll need to make some updates with the re-release to clarify this because the content in the book was pulled from the original text and really doesn't explain it well. Thanks for pointing it out.
Here is the way I play it, which is in line with HARP SF.
First you need to determine if you are throwing at a specific foe or an area.
If you are targeting an individual, you roll your attack (Thrown Weapon Skill) and apply appropriate OB and DB modifiers for the attack on that individual (Note: Armor may or may not be applicable depending upon the type of attack.)
If you hit (exceed 100 or your roll), resolve using that location as the point of impact. Consult the applicable weapon rules for randius of impact area and damage modifiers. Your target's body may serve as cover for others. Damage for this individual is calculated using this result. Other damage within the radius of impact are treated as below.
If you miss then roll the d10 for direction and d10 for distance to figure out where it did hit.
If you are aiming for a general area then you do the same Thrown Weapon skill roll but there is no DB to consider so you have a better chance of hitting the area than you do a specific person. Once again, 101 or more is a hit to where you intended to throw it. Misses require the distance and direction rolls to determine where it did hit.
Once you know where it did hit (either by hitting the target foe, hitting the target location, or missing and you use the direction/distance rolls to resolve) then you determine who is in the blast radius and at risk of receiving damage from the attack.
Now that you know who is potentially hit, you roll an OE d100 and add any additonal damage bonuses that were identified for the weapon. This is your attack roll that you determine damage from.
For each individual apply the appropriate DB, cover, dodge, sudden dodge, etc. actions using the same attack roll you just made. Your end result (attack roll - DB and appropriate modifiers) determines the damage and is what you consult the chart for.