Well, it kinda is. It was actually originally solicited for this week.
Now, given that the subsequent solicits are all for the 4th week of the month, it's possible the June one may have been an error but I doubt it. I think DC realised that #2 was going to be a bit late and have pushed the book back a week on the schedule for the later issues.
I think it was just dumb planning on DC's part. With that fifth week last month a couple of titles were odd this month, like Batman Inc being solicited for the third week, and Ravagers 2 coming out 2 weeks after the first