Thank you so much, Mr Fox and White Punk OD for answering. A friend/colleague of mine who works in post-production had the same kind of problem and he contacted Nugen Audio. Just FYI, this is their answer:White Punk OD wrote: ↑Mon Feb 24, 2020 01:18 CET@Frequency Painter, EXPOSE tool (by Mastering The Mix) says you have -0.6dB Peak! Good old Cool Edit says -0.64dB. I always check with both.
Not sure which tool gave you a wrong reading? DAW meters normally can be switched between Peak and VU.
Are you sure about the gain staging? Seems a lot of red everywhere. I would like to see you in the top 10, as the basic sound is lovely. Just be a bit softer with the faders
"EBU Tech doc 3341 specifies the expected loudness tolerances for loudness meters (see the test signals on page 10). These are all rated as ±0.1LU. This means that two meters that are both compliant with the standards could read values that differ by up to ±0.2LU. Although the loudness standards are fairly well described, there is a little room for manoeuvrer in how they are implemented, and this is where small rounding errors can creep in.
Another thing to consider is the resolution of what is being displayed. If the reading was right on the threshold of wrapping to the next number (-22.95 for example being displayed as -23.0), only a small change (for example -0.00000001) would be enough to make the apparent value change by 0.1.
The EBU currently recommends a tolerance in pre-recorded material of ±0.5LU for acceptance. You should always aim for the target of -23LUFS, but because of the reasons mentioned above, ingest houses and broadcasters are encouraged to accept content reading in the range of -22.5 to -23.5LUFS."
Baseline conclusion for me right now: meters can't be trusted 100%.