Greetings octopus4848!
That situation is strange indeed. If you read the document they provide on their website (
http://www.eurocontrol.int/muac/gall...010-OP-001.pdf), they clearly state that you need to be under 25 on October 1st 2010. If your 25th birthday is in June 2011, then you surely meet the age requirement.
Nowhere on their website or on any other place have I found any indication that you need to be 25 when the training starts, although I believe that may be the case. It is the only explanation for their action.
I am sorry I am not more helpful, but if you do find the answer will you please let me know? Unfortunately I may well be in a similar situation, since I will be 25 next March.
Thanks in advance!