diff --git a/DESCRIPTION b/DESCRIPTION
index 1733640..e40a171 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -2,9 +2,9 @@ Package: sfdep
 Title: Spatial Dependence for Simple Features
 Version: 0.2.4.9000
 Authors@R: c(
-    person("Josiah", "Parry", , "josiah.parry@gmail.com", role = c("aut"),
+    person("Josiah", "Parry", email = "josiah.parry@gmail.com", role = c("aut"),
            comment = c(ORCID = "0000-0001-9910-865X")),
-    person("Dexter", "Locke", 'H', "dexter.locke@gmail.com", role = c("aut", "cre"),
+    person("Dexter", "Locke", email = "dexter.locke@gmail.com", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0003-2704-9720"))
   )
 Description: An interface to 'spdep' to integrate with 'sf' objects and the 'tidyverse'.
@@ -35,7 +35,7 @@ Suggests:
 Config/testthat/edition: 3
 Encoding: UTF-8
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.3.1
+RoxygenNote: 7.3.2
 Imports: 
     sf,
     cli,
diff --git a/R/spacetime-methods.R b/R/spacetime-methods.R
index 7285c23..375b89f 100644
--- a/R/spacetime-methods.R
+++ b/R/spacetime-methods.R
@@ -53,7 +53,7 @@ spt_update <- function(x, ...) {
 
 #' Cast between `spacetime` and `sf` classes
 #'
-#' @param x for [sfdep::st_as_sf()] a spacetime object. For [sfdep::as_spacetime()]
+#' @param x for [sf::st_as_sf()] a spacetime object. For [sfdep::as_spacetime()]
 #'   an sf object.
 #' @param ... arguments passed to merge.
 #' @export
diff --git a/R/utils-set-operations.R b/R/utils-set-operations.R
index 5e99caf..ac63976 100644
--- a/R/utils-set-operations.R
+++ b/R/utils-set-operations.R
@@ -23,6 +23,7 @@
 #' @export
 nb_union <- function(x, y) {
   res <- mapply(union, x, y, SIMPLIFY = FALSE)
+  res <- lapply(res, sort)
   res <- fill_missing_nb(res)
   class_modify(res, "nb")
 }
@@ -32,6 +33,7 @@ nb_union <- function(x, y) {
 #' @export
 nb_intersect <- function(x, y) {
   res <- mapply(intersect, x, y, SIMPLIFY = FALSE)
+  res <- lapply(res, sort)
   res <- fill_missing_nb(res)
   class_modify(res, "nb")
 }
@@ -40,6 +42,7 @@ nb_intersect <- function(x, y) {
 #' @export
 nb_setdiff <- function(x, y) {
   res <- mapply(setdiff, x, y, SIMPLIFY = FALSE)
+  res <- lapply(res, sort)
   res <- fill_missing_nb(res)
   class_modify(res, "nb")
 }
diff --git a/man/as_spacetime.Rd b/man/as_spacetime.Rd
index e0990c6..da99232 100644
--- a/man/as_spacetime.Rd
+++ b/man/as_spacetime.Rd
@@ -13,7 +13,7 @@ as_spacetime(x, .loc_col, .time_col, ...)
 \method{as_spacetime}{sf}(x, .loc_col, .time_col, ...)
 }
 \arguments{
-\item{x}{for \code{\link[=st_as_sf]{st_as_sf()}} a spacetime object. For \code{\link[=as_spacetime]{as_spacetime()}}
+\item{x}{for \code{\link[sf:st_as_sf]{sf::st_as_sf()}} a spacetime object. For \code{\link[=as_spacetime]{as_spacetime()}}
 an sf object.}
 
 \item{...}{arguments passed to merge.}