Dwarfpool cheating a bit. 
Anytime when you open http://dwarfpool.com/zec page, you'll see in "Last 50 found blocks" that pool found new block with 1-5 minutes back.
But if you reopen this page after 15-20 mins, you''ll se that no block found at that time.
and
Anytime when you open http://dwarfpool.com/zec page, you'll see in "Last 50 found blocks" that pool found new block with 1-5 minutes back.
But if you reopen this page after 15-20 mins, you''ll se that no block found at that time.
and
Dwarf might be cheating, I really don't know. But I believe you are misinterpreting the info they provide.
The block listed as "2 minutes ago..." is the one currently being mined. And dwarf very seldom is the pool to actually find the block. Therefore, when you open the page after 20 min, you'll see a similar "4 minutes ago..." for another block currently being mined and probably the previous blocks were found by another pool.
Got it?