Printing Across and then Down Multi-Column Report

I'm trying to do something similar, but with images, where I want do display them 4 across and then down. I followed the instructions in the KB article for going across then down, but my result looks like this:

A | B | C |

E | F | G | D

 I  | J | K | H

Can you give me any ideas as to why the fourth image for each line is appearing in the right position but one row down?

Thanks,

Tracy