Looking good to me in general. Of course being a Virgo I had to change:

R-LInk Page

to:

R-Link Page

Also, if the interval is set to 6, shouldn't the first range be either 0 - 5 or 1 - 6? 0 - 6 is actually seven sites, and so is 6 - 12, etc. Is there a site w/ ID# 0? It's still a bit confusing because I have 20 sites, yet when I pick the 18 - 20 range only two show up, but if I set the interval to 25 and rebuild the range I do in fact count 20 sites. The ID#'s are not shown, so it's hard to tell what's going on there.

My first and last links come up w/ the "Delete" checkbox selected by default.

Otherwise looking good. Thanks!