My first question is, do you have a contractor and is he still on the site. If yes,address your concerns and see if he will correct the problems. To answer your question about the spacing, yes you need the clips for expansion.A good contractor will not let shoddy work remain on the job if he cares about his business. Remember, if he lets this go by, what else is he letting by. If he is working on the structure, I would stop all work and money untill it is fixed.If he gives you the run around I would take a close look at the other work the crew has done. What we don't know is did his crew do the work or did he hire a sub. Let us know what happens. Ron J.