diff --git a/webif/html/sched/list/index.jim b/webif/html/sched/list/index.jim
index 22c15b9..c0d14dc 100755
--- a/webif/html/sched/list/index.jim
+++ b/webif/html/sched/list/index.jim
@@ -83,15 +83,16 @@ proc eventrow {event {table TBL_RESERVATION}} {
 	set d [$event get nduration]
 	set e $($s + $d)
 	set n [clock seconds]
+	lassign [$event padded 1] sp ep
 
-	if {$n > $e && [$event get ersvtype] <= 3} {
+	if {$n > $e + $ep && [$event get ersvtype] <= 3} {
 		set ended 1
 		incr num_ended
 	} else {
 		set ended 0
 	}
 
-	if {$d > 0 && $n >= $s && $n < $e} {
+	if {$d > 0 && $n >= $s - $sp && $n < $e + $ep} {
 		set showing 1
 	} else {
 		set showing 0
@@ -198,7 +199,8 @@ proc eventrow {event {table TBL_RESERVATION}} {
 		}
 
 		if {$table ne "pending" && $showing} {
-			set perc [expr [expr $n - $s] * 100 / $d]
+			set perc [expr [expr $n - ($s - $sp)] * 100 / \
+			    ($d + $sp + $ep)]
 			puts "<br>"
 			puts "<img class=va
 			    src=/images/745_1_11_Video_1REC.png>"
diff --git a/webif/lib/rsv.class b/webif/lib/rsv.class
index 12a9951..15ce3c6 100755
--- a/webif/lib/rsv.class
+++ b/webif/lib/rsv.class
@@ -126,11 +126,19 @@ rsv method name {} {
 	return $name
 }
 
-rsv method padded {} {
+rsv method padded {{l 0}} {
 	if {$ulPreOffset > 0 || $ulPostOffset > 0} {
-		return 1
+		if {$l} {
+			return [list $ulPreOffset $ulPostOffset]
+		} else {
+			return 1
+		}
 	} else {
-		return 0
+		if {$l} {
+			return {0 0}
+		} else {
+			return 0
+		}
 	}
 }
 
@@ -332,12 +340,22 @@ rsv method insert {{table pending} {force 0} {defer 0}} {
 	set now [clock seconds]
 
 	# In-progress check
-	if {$nsttime <= $now} {
-		if {$table ne "pending" && $nsttime + $nduration >= $now} {
-			# Still showing - OK if real-time scheduling addition.
-			if {$action != 0 || ![rsv rtsched]} {
+	if {$nsttime - $ulPreOffset <= $now} {
+		# Start time in the past
+		if {$nsttime + $nduration + $ulPostOffset >= $now} {
+			# Still showing
+			switch $action {
+			    0 {	# Add
+				# Ok if real-time scheduling in use.
+				if {![rsv rtsched]} {
+					throw 20 "Event already in progress."
+					return
+				}
+			    }
+			    default {
 				throw 20 "Event already in progress."
 				return
+			    }
 			}
 		} elseif {$action == 0} {
 			throw 20 "Event has finished."