If you look at some of the forum posts by the moderator you will see it was intentional. They are attempting to force people to use the same way as if they are noobs. If an attack is less then a second apart then it could randomly be changed for placement. I have just been sending as usual, about 200 ms per train. If the attack is bad with the nuke being anything other then 1st, I cancel and resend. Repeat until the nuke is first. The attacks still aren't perfect but they are tight enough to beat any noob.