That does sound quite strange, and indeed rather bad.
Which version of Tiki is this on?
Is this in WYSIWYG mode (and if so html or wiki)? (because once a page is loaded into tiki-editpage.php the server shouldn't be doing anything else (hmm, except auto save posts i guess - could be that...)
And it's only this one page causing trouble, right? Would need to see the source of the page to try and recreate it to test - maybe join us on IRC and we can try and work out what's gone wrong.