Yes it does that's why yuu cannot answer what happens after activation as a back end of yuur wallet
If yuu start spending with jnkts and bio110 your transaction will either be picked up by different miner or left in the mempool. All transactions from orphaned blocks are invalidated - blockchain is rolled back and new blocks are accepted instead.
Utxos don't travel. They are either spent or unspent. If you roll back the blockchain, the spent utxos in those blocks become unspent again. And newly created utxos were not created.
Good luck in September!
