I have the same experience as Gregor. The control in the pagerTopLeft facet and the control in the pagerTopRight facet results in the Previous…Next ending up one row below the Collapse All/ Expand All. Note that this is happening in IE8, NOT in Firefox 15.
I tried to move the pager control to the middle facet, pagerTop, et voila! Now the pager is lined up nicely with the expand/collapse. Weird but working for me.