I'll try to make this short and sweet: Cover rolls (Soft and Hard cover) only state that if you have Soft Cover your armor roll is treated to have +1 or +2 to the end results. It does not say anywhere about rolling LESS dice.
In the Vehicle Damage Table explanation, it says, "When a vehicle suffers one or more damage, but is not destroyed, the attacking player rolls a number of Combat damage dealt to the vehicle before the Armor roll. Cover reduces the damage dealt, and therefore reduces the number of dice rolled."
So, let's say I roll 3 hits against a vehicle. The vehicle is [somehow] in soft cover. The vehicle rolls 1 hit on his armor roll. He takes 1 less damage from the successful roll, and one less damage because his results gained +1 hit on his armor roll from the soft cover. Now, am I reading it correctly that I now roll the VDT roll (To check if the Vehicle suffers any handicaps), which would normally be 3 (The amount of hits I scored before the armor roll), however I can ONLY roll 2 dice now because the vehicle was in cover????? If so, this is only specific to the VDT and not cover rolls in general right? (As in, if I roll against someone in cover, they simply get +1 to their results, I don't roll one less attack dice right?)
Hope that makes sense, thanks in advance!!!