Tileset problems

[sparkers]

Ok so first of all I need to say that I made a tileset based off of a
Template (had little boxes with E's and some boxes that said stuff such as blocking,non-blocking etc.) but for somereason the pieces didn't quite go as they were said to be like The non-blocking ones blocked,blocking ones sometimes blocked and didn't,etc.
I've seen on servers with custom tilesets that theirs work fine so how do
you actually make it so some tiles block and don't.