Site Title & Tagline disappear upon scroll

I’ve removed the Site Title & Tagline animations by modifying the CSS to
‘ -webkit-transition: none;
transition: none;’

And I’ve moved the Title down by adding padding:

‘#page .site-title {
padding: 0;
padding-top: 70px;
text-align: center;
width: 100%;
}’

Now, it looks pretty much like what I want to it when it first loads. However, when I scroll down one “click” of my mouse wheel, both the Title and Tagline disappear- only to reappear a second later. What on earth is causing this and how can I make it stop?

Thanks for any ideas folks.