My problem is not created by the substitution of the colons: I can't understand why filenames are shortened (in the referred case all 3 of them) apparently after the semi-colon, so they should have the same name and to avoid the overwriting they are marked with a progressive number.
I can't understand because it does not happen every time: I apply the same naming rules everytime and I type the informations not using the internet sources.
By the way I ripped more than 1900 Classical CDs and had the problem less than 10 times (at least I hope so, but I will check all the archive).