Declare Blocker step priority ?

After playing with Forge, I noticed that during the declare blocker step, (if I am the defending player of course), I only get casting priority BEFORE declaring my blockers. But according to the ruling, rule 509.4, the active player receives priority AFTER declaring the blockers. Same goes for the declare attackers step. The active player should get priority AFTER declaring attackers. Once I declared an attacker, the only thing I can do is go to the next step.
Anybody noticed this ?
Anybody noticed this ?