Cash balances query

I’ve recently been trying to import my T212 data into my accounting software to track my assets to help with tax calculations. I’ve been struggling as despite pulling all the data in, the cash balances don’t reconcile (especially with the monthly statements). They’re not off by much, but they are off, and it compounds.

I submitted a support request regarding this and got the response that as the cash is invested, its value fluctuates with the underlying instruments. I was under the impression that that’s where the interest comes from.

Can anyone confirm if they have observed their cash balances going up or down without any transactions having taken place?

If this is indeed the case then we need a way of either:
a) Obtaining the underlying transactions into the various MM funds and bank accounts so that we can record the transactions in our accounting software.
b) Obtaining the daily cash balance adjustments