multiple authors format for saving space
The conference chair might tell you otherwise, but you could probably do it. I've even seen (with ACM conferences) putting both emails on one line as

(author1, author2)@institution.edu

But that assumes the email addresses are easy to associate with a person's name. 

But there is no particular reason not to submit it with your best effort as to layout. Maybe it gets edited after review in any case. 

But also note that most people in CS expect that the author listing will be alphabetical. But the "true" meaning of that is "the order doesn't matter and we all built this together." So, it might not be a problem.