Yeah. but once it's tagged or invoked, it goes away. Or it might even go away before it's tagged. And the player can't control if the aspect is fragile or sticky. It all depends on the attack role and the defense roll. It's only fragile if the defense is equal to the attack. If the attack gets +1 shift, it's sticky.
And, if you tag it once and it goes away...there's no aspect left to tag. Meaning the second tag no longer works. You can't tag an aspect that's not there.
To be clear, maybe you should write, If he places a 'sticky' aspect on the character, he may get 2 free tags.
Edit: Also, if the enemy 'removes' the aspect, before the players ally uses the tag, if the player puts another 'hobbled' aspect on the enemy, the players ally does not have 2 tags - even though he never used the first tag. The first tag disappeared when the enemy removed the aspect.