From the following attachment you can find previous blocks and blocks are very different now,This is the reason for layout we miscalculated the time,Among the a,b,c,d variation
You can see from the following annex the original block and the block now are very different, which is caused by the time we misjudged layout reasons, among which a, b, c, d block change is large,
From the following attachments, you can find that the original block is very different from the current block,This is the reason we are wrong to estimate the timing of the layout,Among them, a, B, C, D block, the larger change,