I don't know the story here like some, but I am sorry that both of you are hurting so much. It does seem as if he left the stuff on the porch because he couldn't face seeing you. I don't think the trash bags were suppose to be disrespectful but a way of keeping the stuff together and that was waterproof in case of bad weather.
Also as for including the "other stuff." Maybe he felt that these were things you would want even if you didn't ask for them. I know that somehow during my divorce, I ended up with all the wedding stuff (video, pictures, announcement, etc). Sometimes men aren't as sentimental about that stuff. And lots of times, they just assume women are going to be sentimental about it. He probably felt on safer ground giving you the bridal magazines than throwing them out. Also, he did take what pictures he wanted...I am guessing that he probably still kept some with you. And he did include you with his family...to me it would have been worse had he taken them all out...
As for the Mickey...well maybe he should have kept it, but her probably felt that it wasn't appropriate...or that it would be too sad a reminder.
I know that you are hurt (any break up leaves hurt feelings) but please don't put your feelings on him. He might have felt he was doing a good thing, but you interpret it as a bad thing. It is a matter of perception. That could also explain his reaction to your note...he might have felt he was trying to do a good thing by adding in the extra stuff and making it available even if he wasn't, and was caught off guard by your note.
Anyway, I just thought I would try and give you a different perspective on the situation. Having been through a divorce with lots of misunderstandings at the begining, I learned not to automatically think that the other person was thinking the same way as me...when I wasn't sure, I got clarification...probably why my ex and I are able to get along when thrown together now (we still have some of the same friends).