As I mentioned Buddy my coding expertise is next to zero I just play around with the code that I find and try and work out how to use it to do what I want (not lazy just coding challanged 8) ) When you say "but the desired effect is still not there" what is your desired effect exactly. From memory that code I posted should do what I call "the alternate sweep" where one 8 LED row flashes on and off one LED after the other from LED 1 to LED 8 and back again ad infinitum, and the other does the same thing from LED 16 to LED 9 (if that makes sense)
p.s. You aren't still using that 1 mf capacitor on the latch (STCP) from that Shiftout page are you? (just a thought as I have seen many people on this forum condemn that cap)