Regards the second link. Weren't able to sign him due to red tape in summer window of 14/15 season (first link, dated '18 August 2014'), where able to in the winter window of 14/15 (7 January 2015) as they went back in for him. The exact reason why they were suddenly able I don't know off hand, but I assume Sunderland knew what they were doing and the fact I can't name this particular subsection and heading within the FFPR rules doesn't mean they weren't able to. Whatever was stopping them in the Summer simply wasn't in the Winter, if you wish to know the exact reason feel free to look it up yourself as for me the fact Sunderland were able to go for him (even if they didn't get him) suggests that the Red Tape no longer applied in the second 14/15 transfer window.
Remember how I said "wouldn't be surprised", that denotes opinion, not fact. My opinion being formed by the relentless selfies and instragramming the kid did, which gave the impression he wasn't treating his opportunities with respect and taking the piss out of the club who pay him (us). Now, if I am to be repremanded for forming an opinion on Zucculini's actions over the course of last year, I suggest a forum where opinions fly everywhere might not be for you.