I have argued previously that your interpretation of Grime's opinion is incorrect and misleading. As to the FSS they gave no opinion on swab 3A;
An incomplete DNA result was obtained from cellular material on the swab 3a. The swab contained very little information and showed low level indications of DNA from more than one person. However, all of the confirmed DNA components within this result match the corresponding components in the DNA profile of Madeline McCann.
https://www.mccannpjfiles.co.uk/PJ/JOHN_LOWE.htm
That is very similar to this, which has been accepted without question;
An incomplete, low-level DNA profile that matched corresponding components in the profile of Gerald McCann was obtained from cellular material present on the card key
https://www.mccannpjfiles.co.uk/PJ/JOHN_LOWE.htm
You would need to read the while report on the DNA samples
The DNA evidence does not show that the sample came fron Maddie... The FSS explained these markers are common to a lot of people... And the alerts themselves are not evidence...
You refuse to accept reality imo
EtA.... You will find the difference in the DNA is because the sample in the key FOB came from one person... Whilst the previous one came from 3 to 5 people... Can you see the difference
That's, what happens when people who don't understand the forensics draw their own conclusions