PokerStars. Signing up for the wrong tournament or SnG?

My online poker activity amounts to no more than casual gaming at low limit NL Holdem SnGs on PokerStars. That's my idea of fun! [img]/images/graemlins/wink.gif[/img]. However, I have a small complaint which probably boils down to me being inexperienced at this.
I have more than once registered for the wrong SnG. E.g. signing up for Omaha or fixed limit instead of NL. I never find out before the first hand is dealt.
I know I can be more observant but are there anyone doing the same mistakes as I do? I tend to think that the software is a bit poor in that respect. Are there better sites out there wrt interface?
Are there any way of configuring the PokerStars client? I havn't found any...

(By the way, Omaha Hi/Low is actually quite entertaining [img]/images/graemlins/laugh.gif[/img])