[Attack roll] not correct ?

Wildfar
Level 2
8 months ago (edited)

As far as I'm remember, standard attack roll (without bonus from any source) is like this for a lvl20 :
-----
Fighter/Paladin/Ranger : +20/+15/+10/+5
Cleric/Thief : +15/+10/+5
Mage : +10/+5
-----

When I'm checking combat roll, for my lvl6 Paladin & Spellblade, all their attacks rolls on a round are +8 (+6 base, +2 Str) in place of a +8 on first attack and +3 on the second attack.
Logically each attack would be done 5 points below than the previous one, no ?