Stacyhs, the quote you have supplied from the Marasca CSC panel MR is actually part of their summary of Sollecito's appeal arguments on page 14 of the translation.
The actual Marasca CSC panel MR statement on the problems with the DNA collection and testing is on page 26 and goes beyond the obvious contamination problems:
"....In homicides such as this (such pressure {from the media}) affects not only the timing but also the competence and the correctness of the investigative activities. Not only this, but when – as in this case – the outcome of such research depends greatly on scientific investigations, the aseptic collection of all the samples useful for the investigation – in conditions that guarantee prior sterility that avoids possible contamination – constitutes, notably, the first prudent, shrewd and essential prelude – in its turn – of a correct analysis and “reading” of the recovered samples. So when the central point of technical activity contains specialist genetic investigations, the contribution of investigative activity is ever more relevant; credible parameters of correctness must respect international standards of protocols, following fundamental rules of approach prescribed by the scientific community, on the basis of statistical and validated observations.
The rigorous respect of such methodical norms offers a conventional coefficient of acceptable credibility of such results, primarily linked to their reproducibility - namely the possibility of obtaining these results, and only these, reproduced with a constantly identical method and under identical conditions, according to fundamental empirical rules. On a more general level following the scientific method starting with Galileo Galilei on the application of the “scientific method”. This is typically leading to “objective” reality, reliable, verifiable and agreeable – well-known to be consistent, on one hand, in the collection of empirical data agreeable with the hypothesis and the theory to be validated; on the other hand in the mathematical and rigorous analysis, associating in this way – as first affirmed by the above-mentioned Galilei - "sensible experiences" to "necessary demonstrations", that constitute experimental mathematics.
4.2. As will be seen, all of this {necessary attention to proper scientific procedures required to obtain credible forensic results in accordance with international standards as stated above} is essentially missing from the present trial."