Hi Honglu69,

Are you sure that your core is correct because I discover on my pool :

2386069 113 left 05/01/2021 13:26:44 2.5000 10,000.00
2386056 Orphan 05/01/2021 13:25:12 0.0024 10,000.00
2386054 98 left 05/01/2021 13:23:49 2.5000 10,000.00

Why this difficulty "0,0024" between 2 blocks ?