Claim -> was collect.iotatoken.com -> send a small amount of BTC -> your address is in the genesis
If you did that in time, then you did successfully claim.
Re-claim -> The addresses changed at some point and you had to claim the iotas again to a new address. You can still get your iotas if you didn't do this.
In my case, I have successfully claim but I don't know how to re-claim. I have been told to contact David (iotatoken). However I have not still received any response (it is the weekend)
However, if someone can help me to re-claim, that would be good.
you can learn how to do it here - http://www.iotasupport.com/claimingyouriota.shtml
In his case it looks like David has to do it manually.