Yeah, I can definitely hear that on some of those runs. However, as Flash said: that's what makes Maiden who they are. They don't play perfect, they don't sync up every hit and pick note by painstakingly tracking over and over again - they get it to sound alive and say, "That's it." I can't help but feel that a great deal of Maiden's emotional power and energy would be wiped away if every recording was played perfectly.
Also, Adrian Smith does not play sloppy notes, he plays exactly what the song needs because he has spiritually analyzed the song in every known and unknown dimension before pressing record.