Improve readability

lib/cartodb/api/middlewares/cache-control-header.js

@@ -25,9 +25,9 @@ module.exports = function setCacheControlHeader ({
             const directives = [ 'public' ];
 
             if (everyAffectedTablesCanBeInvalidated(affectedTables)) {
-                directives.push(`max-age=${fallbackTtl}`);
-            } else {
                 directives.push(`max-age=${ttl}`);
+            } else {
+                directives.push(`max-age=${fallbackTtl}`);
             }
 
             if (revalidate) {
@@ -42,5 +42,5 @@ module.exports = function setCacheControlHeader ({
 };
 
 function everyAffectedTablesCanBeInvalidated (affectedTables) {
-    return affectedTables && affectedTables.getTables().some(table => !table.updated_at);
+    return affectedTables && affectedTables.getTables().every(table => !!table.updated_at);
 }