I'm not sure why that happened, so I did some testing to try to replicate it. Just now I tried to make a new character, and once I got to the character creation screen I immediately went to Abilities, and saw a screen like you saw. This would make sense since I didn't hit SELECT for any powers. But as soon as I went to the GROUPS screen, and hit SELECT for the default brawler powers, I moved back to the abilities tab, and I saw it had changed to reflect my power choices.
Just going to the Powers tab and hitting select, also leaves the screen as you posted. Make sure you are making your initial power group choices by hitting SELECT from the GROUPS tab, in order to have the ABILITIES tab update accordingly.
It is a bit confusing, but GROUPS is where you select your archetype. POWERS is where you choose the powers specific to your archetype choice. Abilities is where you see which powers are in your primary and secondary power sets, and choose which ones from your primary you want to slot to begin play with.
Easy steps...
1)Go to groups and select powers by hitting SELECT.
2)Go to Powers tab, and select powers from the available options, and hit SELECT.
3)Check ABILITIES tab, and it should be updated.
Hope this helps...