Do not do math while you're asleep.

lib/api.js

@@ -153,13 +153,13 @@ app.get('/pool/ports', function (req, res) {
 app.get('/pool/blocks/:pool_type', function (req, res) {
     let limit = typeof(req.query.limit) !== 'undefined' ? Number(req.query.limit) : 25;
     let page = typeof(req.query.page) !== 'undefined' ? Number(req.query.page) : 0;
-    res.json(global.database.getBlockList(req.params.pool_type).slice(page*limit, page * (limit + 1) + 1));
+    res.json(global.database.getBlockList(req.params.pool_type).slice(page*limit, (page + 1) * limit + 1));
 });
 
 app.get('/pool/blocks', function (req, res) {
     let limit = typeof(req.query.limit) !== 'undefined' ? Number(req.query.limit) : 25;
     let page = typeof(req.query.page) !== 'undefined' ? Number(req.query.page) : 0;
-    res.json(global.database.getBlockList().slice(page*limit, page * (limit + 1) + 1));
+    res.json(global.database.getBlockList().slice(page*limit, (page + 1) * limit + 1));
 });
 
 app.get('/pool/payments/:pool_type', function (req, res) {