Problem is that (afaik) the pagination routine does something wrong if $start and $summarize are nearly the same figures. 10 actual news (summarize=10) plus an seperate archive with starting (&start=11) at 11 + pagination (same summarize=10) doesn´t work.
Thank you for uncovering this. The root of this problem is start and pagination were coded to work together in this manner. I will make the needed changes in 1.0.3 so that this will work properly.