tstenback
Hopelessly Addicted
Neons are never tight schooler IME they will at times put on a show but for the most part they are very loose schoolers or even non schoolers. If you want tight schoolers my favorites are harlequin rasboras. Always stay together and look best in schools of 10 or more. the Show is always on with these guys. 
I happen to find the another way to make the neon school.
I think you scared the hell out of them during your redecoration of the tank. That's why they are schooling 