Sorry, that it didn't help. Next question.
At the beginning I had the "problem" only on the start page. Is it same in your case? I just learned, that the startpage will always have only one row of pictures.
But if you go into your archieve, the number of rows will change to the numer you want.
It's ever the numer of rows to change. The number of colums (picures per row) you can change on administration page. There you can setup the normally used number of rows.
If this does not help you, maybe it would help to know which version number you use. I use v1.7 and cannot get your results.