Umerged manually merged transactions

Describe the problem:
A Balancer B-50WBTC-ETH was not showing up as liquidity in/out. I thought I could manually merge three transactions (withdraw of WBTC, withdraw of ETH, and deposit of B-50WBTC-ETH) but after merging two I was not able to merge the two transactions with the third.

How do I unmerge these, and how would I link these three transactions?

Which exchange/wallet is this regarding?
ETH wallet

How did you import data into this wallet?
Synced

What have you tried to fix this so far?

I also need to unmerge some transactions.

Please provide directions on how to unmerge transactions