Uneven inner tube when inflated inside the tyre I have bought a new inner tube that, when I inflate it inside the tyre, it stands out in the part of the valve. In the beginning I didn't realize but riding the bike it felt OK with a small bump periodically every meter or so.
I took it off to inspect it and you can see that in the area of the valve it stands out of the tyre. See picture below. 


I am used to change inner tubes and this has never happened before. It is the same size as the usual specialized although this are cheaper. Is there anything that I may be doing wrong or should I return them? 

PS: Other cases where the inner tube is not even although inflating it outside the tyre here and here.
When installing an inner tube, one must take extra care with regard to the area near the valve stem.  It is fairly easy to get a portion of the thickened area around the stem "trapped" behind the tire bead, leading to a situation where the bead does not seat completely and resulting in a lump.

There are several strategies to deal with this.  First, make sure the tube is partly inflated (almost fully "puffed out") when you insert it into the tire and mount the tire.  Then, after the tire is (mostly) seated on the rim, let any excess pressure out of the tube and then press the stem in with your finger, about as far as you can get it to go.  This helps pull the rubber around the valve out from behind the tire bead.

Then, when you think you have it all together, carefully inspect the bead all the way around to make sure it's evenly seated to the rim everywhere.  Correct as needed.

I will note that if a tube is too large or too small you may get lumps, but your tube appears to be properly sized.