I notice that after kucoin completed MainNet Swap of SPHTX, 1 SPHTX receives only 0.05 SPHTX coins. I think it should be 1:1 ratio if kucoin swaps on time. Then we lose 0.95 coins for each SPHTX, right?
No you didn't read that correctly. All tokens traded on Kucoin are mainnet tokens. If you deposited before the mainnet launch and just held, your balance was swapped to mainnet tokens 1:1 and because you deposited ERC20 tokens to Kucoin, you get an additional 5% SPHTX from the buyback event. In total you get 1.05 coins for each SPHTX you held during the snapshot.