GA Revenue & WooCommerce Revenue Mismatched

I didn’t have any trouble installing the plugin after reading the comments in the reviews, and data appears to be collecting in Google Analytics. However, the data has been collecting for 4 full days and there’s a clear mismatch between the two.

Pardon the formatting, but here is the difference. As you can see, some days it’s accurate, some days it’s not, and the amount of difference varies.
WooCommerce Google Analytics $ Difference % Difference
$579.29 $591.76 $12.47 2%
$404.11 $0.00 ($404.11) -100%
$378.14 $378.14 $0.00 0%
$190.05 $190.05 $0.00 0%
$1,551.59 $1,159.95 ($391.64) -25%

Google Analytics only reports 4 transactions, where WooCommerce reports 6 in the WordPress back-end.

The last two days have been accurate, so maybe there was an adjustment period for the first 48 hours as the data began collecting… but if not, what might be causing these differences? What kinds of things should I investigate?

https://wordpress.org/plugins/woocommerce-google-analytics-integration/