Re: URLs coming up wrong on button links...
Your link is broken (shows another site).
Do you get any suspicious PHP error or notice if you enable error reporting?
In case you know PHP, the relevant code is in tiki-filter-base.php. Although finding the bug may be non-trivial without a debugger, working around may be accessible, hardcoding $tikiroot, $tikipath and/or $tiki_setup_dir.
;){kind=link}
;){kind=link}