IBKR Fees

Hi I just opened IBKR and executed my first trade but the commission fees doesn't look right.

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For Currency Conversion I bought USD $2,873. IBKR fee is 0.02% which means the commission should be 0.02% * 2873 = 0.5746. Since this is lower than the minimum USD $2, shouldn't my final commission fee be $2? Why is it $2.94

Even if it's shown in SGD, USD $2 = SGD $2.75 at the time of writing this.

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The fee when I bought VUAA also doesn't look right but I'd like to settle it one-by-one. Thanks for any comments!