This has already been addressed by a couple of posters.
In what areas were they sloppy and careless? These are very experienced arbitrators we are talking about here, in fact I believe the chairman is one of the most experienced arbitrators the CAS has. I think you're buying a little too much into what Gordon is saying. It's a pretty thorough, damning and iron-clad judgement.
The judgement states some things are facts which are incorrect - that is a fact.