Forum Lag?? Urgent

Technical Details

Forum version : #phpBB3
Position : Founder
Concerned browser(s) : Google Chrome
Screenshot of problem : https://i.imgur.com/tkJRJgH.png, https://i.imgur.com/uy8iz4t.png
Who the problem concerns : Yourself
When the problem appeared : Every time I change the css or something considered "major" I suppose
Forum link : http://op-endlessfrontiers.forumotion.com/

Description of problem

So my form is suppose to look like this;

https://i.imgur.com/06l44VL.png

https://i.imgur.com/39TpEhc.png

But as seen the in the screen shot section above; for me at least, it doesn't look like this. And I'm not entirely sure why, this has happened before and if I change something in the css (doesn't matter what, I just have a small color code that I switch back and forth for this); hit submit then save, it usually goes back to normal, however this time around it isn't doing that.

My friends have told me this is similar to lag, but I'm not sure as they don't get this issue like I do.

Is this an issue with logging into your forum?

No, I can log into it just fine, it's the skin; it's jumping back into old versions of itself.

clear your browser cache and cookies
restart your browser and do an update of the browser.

The forum looks fine to me.

After doing that, everything has returned to normal, I feel so silly. I had over 400mb in cookies and what not. ;o;

Thank you for the help though! xD