I have similar mutual funds in separate brokerage accounts, the have different names and different symbols, but when I change one, it also changes the other.
For example: One holding is PIMCO Stocks with a symbol PISIX that closed at $7.91. The other one in a different account is PIMCO DVRSFD with a symbol of PDIIX that closed at $9.00. If I manually change the name, symbol, or closing price in one account manually, Quicken also makes the same change in the other account. Thus, if the value of the holding in one account is made right, the other account has a wrong value. I have not been able able to figure out how to separate them, so each can be adjust to their correct account values. I hope this is clear so I can given a solution.