diff --git a/tools/scripts/new_sequence.sh b/tools/scripts/new_sequence.sh
index 06474a5..34af796 100644
--- a/tools/scripts/new_sequence.sh
+++ b/tools/scripts/new_sequence.sh
@@ -45,7 +45,7 @@ esac
 exec 3>&1
 
 cd $tribe
-existing_seq=$(ls -d */)
+existing_seq=$(ls -d [0-9][0-9]_*)
 nbr_seq=$(echo $existing_seq | wc -w)
 next_seq_number=$(expr $nbr_seq)
 
@@ -94,7 +94,7 @@ case $selection in
 esac
 
 
-title_path=$(echo ${title// /_} | iconv -f utf8 -t ascii//TRANSLIT)
+title_path=$(echo ${title// /_} | iconv -f utf8 -t ascii//TRANSLIT | tr -cd '[:alnum:]._-')
 sequence_path=$tribe/$(printf "%02d" $next_seq_number)_${title_path}/
 mkdir -p $sequence_path