Seren, funny you should say that, as I had a bit of a rude awakening in the summer, concerning the whole 1st/2nd claim club business.
I'd basically been part of a local club as 1st claim for about 6 years, but grew a bit frustrated the club would finish about 8th out of 13 teams in the XC league.
I joined a team who compete for the title each year as 1st claim, yet kept my links with the local lot as 2nd claim.
Now, I knew the rule that if both your clubs compete in the same league you have to race for the 1st claim club, no problem.
However, I'd presumed I was still ok to race and count in team scores in open events....
So, leading home the 2nd claim guys to a 10k team win in the summer,delight turned to being GUTTED, when I found out a team mate had RATTED me out to the organisers as "Only" being 2nd claim.
Realised that if you can't count as a 2nd claimer, it's a pretty damm pointless thing to be, so quit the club i'd been linked to for so long, with a little bit of bad feeling really.
So the moral of the story is don't bother with 2nd claim, unless you have no interest in placings etc 
Edited: 20/12/2012 at 20:01