Trek 1.1 chainring issue

[Robert 7]

Hi all! Recently became the owner of a new Trek 1.1 road bike. Taking it out on it's maiden voyage, I noticed the chain rubbing up against the front derailleur. It happened while the chain was on the big chainring up front (It's a compact setup) and the larger cogs in the rear.

Also at this time noticed that the chainring wasn't perfectly flat, in fact it had a small amount of wobble. The noise was sporatic, the chain rubbing as the chainwheel went through it's out of round bit.

Took it back to the lbs the next day, guy worked on it for 20 minutes- looked like he tried to tweak the chainwheel using force, couldn't quite tell what exactly he was doing. Then he asked me to test ride it.

Same deal, chain rubbing front derailleur. Guy told me not to run it in those gears as it was cross chaining.

Rode her into work the next day keeping it out of the cross chain gears and it was fine (did note that morning that the chainring still had that bit of wobble) until I put it into it's highest two gears for some sprinting fun. (Front big ring, rear two smallest rings) Then it rubbed again, this time on the other side of the derailleur cage. It was more pronounced when I was really pedaling it hard. I have read that you can "trim" the front derailleur to rectify the rubbing, but didn't try that yet. Still trying to get used to the unusual (for me) method of shifting.

So my question boils down to- does it seem normal for a new (presumably quality) bike to have some chainring runout? Will this affect the drivetrains longevity? Am I worried about nothing? Thanks for your consideration.