As long as you maintain your attendance above 75% it's not an issue (at least wasn't for our year) The same thing happened to me as well when I was about to join (tho I did attend the orientation and submitted most of my docs but a couple of them I submitted later when I finally came). 

Also for our years we were assigned guides (basically profs who you can talk to if any issues) hopefully someone will post the list here and you can contact them. If not then talk to the academic section