The total votes cast count shown on your profile's activity page takes a good few minutes to update with votes cast.

The votes tab on the activity page is updated almost instantly upon voting as this page is private to you and therefore has much less traffic.

If you want an accurate, immediately-updated count of your votes cast today, like the old top bar dropdown, you can use the Votes bookmarklet from Normal Human:
javascript:(function()%7Bs%3D%7B'upvote'%3A0%2C'downvote'%3A0%2C'deletion'%3A0%2C'undeletion'%3A0%2C'closure'%3A0%2C'reopen'%3A0%7D%3Bm%3Dtrue%3Bd%3Dnew%20Date().getUTCDate()%3Bp%3Dnew%20DOMParser()%3Bw%3Ddocument.querySelector('.profile-me').href.split('%3F')%5B0%5D%2B'%3Ftab%3Dvotes%26sort%3Dall%26page%3D'%3Bj%3D1%3Bwhile%20(m)%20%7Bu%3Dw%2Bj%2B%2B%3Br%3Dnew%20XMLHttpRequest()%3Br.onload%3Df%3Br.open('get'%2Cu%2Cfalse)%3Br.send()%3B%7Da%3D%5B'up%2Fdown%3A%20'%2Cs.upvote%2Bs.downvote%2C'%5Cr%5Cnup%3A%20'%2Cs.upvote%2C'%5Cr%5Cndown%3A%20'%2Cs.downvote%2C'%5Cr%5Cnclose%3A%20'%2Cs.closure%2C'%5Cr%5Cndelete%3A%20'%2Cs.deletion%2C'%5Cr%5Cnreopen%3A%20'%2Cs.reopen%2C'%5Cr%5Cnundelete%3A%20'%2Cs.undeletion%5D%3Bwindow.alert(a.join(''))%3Bfunction%20f(e)%20%7Bx%3Dp.parseFromString(e.currentTarget.responseText%2C'text%2Fhtml')%3Bv%3Dx.querySelector('.history-table').firstElementChild.children%3Bfor%20(i%3D0%3Bi%3Cv.length%3Bi%2B%2B)%20%7Bif%20(v%5Bi%5D.querySelector('.date').title.substring(8%2C10)%3D%3Dd)%20%7Bs%5Bv%5Bi%5D.children%5B1%5D.textContent.split('(')%5B0%5D.trim()%5D%2B%2B%3B%7Delse%20%7Bm%3Dfalse%3B%7D%7D%7D%7D)()
Un-minified source code:
s={'upvote':0,'downvote':0,'deletion':0,'undeletion':0,'closure':0,'reopen':0};
m=true;
d=new Date().getUTCDate();
p=new DOMParser();
w=document.querySelector('.profile-me').href.split('?')[0]+'?tab=votes&sort=all&page=';
j=1;
while (m) {
u=w+j++;
r=new XMLHttpRequest();
r.onload=f;
r.open('get',u,false);
r.send();
}
a=['up/down: ',s.upvote+s.downvote,'\r\nup: ',s.upvote,'\r\ndown: ',s.downvote,'\r\nclose: ',s.closure,'\r\ndelete: ',s.deletion,'\r\nreopen: ',s.reopen,'\r\nundelete: ',s.undeletion];
window.alert(a.join(''));
function f(e) {
x=p.parseFromString(e.currentTarget.responseText,'text/html');
v=x.querySelector('.history-table').firstElementChild.children;
for (i=0;i<v.length;i++) {
if (v[i].querySelector('.date').title.substring(8,10)==d) {
s[v[i].children[1].textContent.split('(')[0].trim()]++;
}
else {
m=false;
}
}
}