Hidden fees? Decreasing balance, money gone but not showing on my statement

On capitec fees it says it's free to transfer between one's own savings account.

I have been noticing that small amounts keep disappearing, today i transferred R460 from my main account to my savings account, the balance shows R459.04.

In transactions history it says R460 was transferred. Is that a hidden fee,? Where are these small amounts going?

Why don't they appear in any statements?