Overlapping header in ACM SigConf template

For shortening the title please use optional text in the title tag, i.e., \title[My Paper Title]{My Paper Title: A Xxxxxx yyy Zzzzzzzzzzz AAAAA Bbbbbbb Ccccccc ddd Eeeeeeeeeeee Ffffffff Ggggg hhh Iiiiiii} and the tag \acmConference which controls the even side page running head