Because of the functions it calls, the timer takes longer to load than the rest of the page. A simple workaround is to move the timer so that it doesn't force questions down when it's loaded, for example by placing it in a fixed position at the top of the page.
Because it uses an external ressource, the calculator also takes a little longer to load. However, given its position under the navigation block, it does not cause any shift.
Knut at the Berlin Zoo in 2007 ↗
Jens Koßmagk - Creative Commons: Attribution-ShareAlike 2.0