FASA Games, Inc.

last phrase says
"The adept's allies may attack the target as if he was blindsided until the end of the next round"
tha means it has a duration of the round in wich it starts (at initiative of the user) and endures until the end of the following round ?
so, if the adept distracting is the first of the round, he can distract the target, that focus on him/her and then his allies can attack the target as if was blindsided for that round and the next one aswell, no matters what it happens ?
or is just 1 round, the one in wich the adept distracts the target ?

End of the second round is typically what that means.

That's usually how I read it.
"Current Round" means this init count. "Next Round" means the next init count.

I think your interpretation is correct, giving a possible 2 rounds of blindside bonus to allies. As a GM, if it became a problem, I'd just make sure that the distraction really worked, having the target focus all its attention on destroying the talent user (usually low-combatant like a thief) and making the character possibly regret pissing off the bad guy. Usually though, it just makes for great fighting tactics, and gets a party to really work together to take down a single foe, and I rarely see a reason to punish for that.