This is where the problem shows up!
Some of my clients still have statistics being recorded BOTH in the old Universal Analytics AND the new GA4. That is OK, but wouldn't you think that the stats in BOTH tools would be EXACTLY the same? They are NOT and some statistics are WAY OFF!
This is simply a heads-up, so don't be alarmed by some of your metrics. If some of your numbers are wildly UP or DOWN, don't worry; I will keep track of these and report to you in your Monthly Reports!