diff --git a/peg.js b/peg.js
index cb5f5b1..f1136c9 100644
--- a/peg.js
+++ b/peg.js
@@ -79,7 +79,7 @@ Peg.Regex = function (regex) {
     regex.lastIndex = index;
     const matches = regex.exec(source);
     return matches
-      ? [[matches, regex.lastIndex], regex.lastIndex, pattern.expectLabel]
+      ? [[matches, regex.lastIndex], -1, pattern.expectLabel]
       : [null, index, pattern.expectLabel];
   }).expects(regex.source);
   return pattern;
@@ -105,6 +105,8 @@ Peg.Choose = function (...patterns) {
       } else if (furthest > furthestFound) {
         furthestFound = furthest;
         furthestExpected = expected;
+      } else if (furthest == furthestFound) {
+        furthestExpected = furthestExpected + " | " + expected;
       }
     }
     return [null, furthestFound, furthestExpected];
@@ -128,9 +130,11 @@ Peg.Sequence = function (...patterns) {
     let furthestExpected = genericExpected;
     for (const pattern of patterns) {
       const [value, furthest, expected] = pattern(source, index);
-      if (furthest >= furthestFound) {
+      if (furthest > furthestFound) {
         furthestFound = furthest;
         furthestExpected = expected;
+      } else if (furthest == furthestFound) {
+        furthestExpected = furthestExpected + " | " + expected;
       }
       if (value == null) {
         return [null, furthestFound, furthestExpected];