ok so i cleared the 1st adventure and got into level up, and chose to level up a skill

how do you level up a power then? unless we can only level up either a skill or a power, not both at the same time

if that's the case i think i'll reset my game 

Hey there.

 

Whether you get to improve a Skill, Power or Card feat, is dependant on the the Scenario and Adventure path awards.

 

As such, when you successfully complete Attack on Sandpoint, the reward is: Each character gains a Skill feat.

 

The reward for Trouble in Sandpoint is: Each character gains a Power feat.

 

Thanks

In other words, you get different rewards and different upgrades From different scenarios. Normally you get only one reward for single scenario.