diff --git a/analysis/app/trend.go b/analysis/app/trend.go
index 9678442..9b47f6f 100644
--- a/analysis/app/trend.go
+++ b/analysis/app/trend.go
@@ -245,7 +245,11 @@
 	if opt.x == "" {
 		opt.x = "commit"
 	}
-	t = table.SortBy(t, "commit-time", opt.x)
+	// TODO(quentin): One SortBy call should do this, but
+	// sometimes it seems to sort by the second column instead of
+	// the first. Do them in separate steps until SortBy is fixed.
+	t = table.SortBy(t, opt.x)
+	t = table.SortBy(t, "commit-time")
 	t = colIndex{col: opt.x}.F(t)
 
 	// Unpivot all of the metrics into one column.