Having trouble with forms not recognising Sparky.

apparently some-ware in settings or code of that component starting / is mistakenly omitted. So that is thing to look for.

www.juststays.commyproperties/form/13/2
www.juststays.com/myproperties/form/13/2

Most likely you could narrow place to look inside that component files

if no luck this nasty fix will work:

$u = JFactory::getURI();
$u = str_replace("juststays.commyproperties", "juststays.com/myproperties", $u);

Well actually it looks like SEF problem because when I disable SEF now works normally