The skill points you receive are for after completing each Tier, not after each quest.  When the trader gives you double rewards, right before the option to ask for "Special jobs" appears, that is when the tier is complete. that extra set of rewards was for the tier quest, and that is when you get these points.

I've seen a lot of Mods/Modlets that increase the number of skill points per level, but personally think that this is more balanced for my style of play.  I'm not trying to dis on those mods, we need more skill points in the game, but i think earning them is a bit more balanced. 

Tier 1 =3 Skill Points
Tier 2 = 4 Skill Points
Tier 3 = 5 Skill Points
Tier 4 = 6 Skill Points
Tier 5 = 8 Skill Points
Tier 6 = 10Skill Points

you can alter these values by adjust the values in the config




For Games already in Progress.

If you do not wish to restart your world, and have already completed some Tier quests for the trader, type the following lines into the game console (Press F1 in-game)

For each tier that you completed:
givequest quest_tier1complete
givequest quest_tier2complete
givequest quest_tier3complete
givequest quest_tier4complete
givequest quest_tier5complete
givequest quest_tier6complete

Then go talk to any trader. You'll get all the rewards including the skill points.


INSTALLATION 

Extract files to your \7 Days To Die\Mods folder, create the folder if it doesn't exist and use the latest edition of 7Zip / Winrar

or just put the zip archive in vortex and let it do the work


feel free to also check me out on the following platforms
Youtube: (new content coming sometime after A20)
Twitch  (mostly here, love to catch you Live in chat)