multiple insert not including post data

Hi folks

I have a bit of a tricky form I have been working with and am having some problems with the multiple insert page.
basicly I have 4 pages each with respective forms.
each form passes a var via post to the next form, which works fine untill it reaches the 3rd page which uses a multiple insert.
The insert works fine but the extra vars I have which need to be passed via post to the 4th and final page are no longer available after insert and redirect.

I hope that makes sense..... will try and explain a little further :)

page/form 1 provides an insert which passes to page/form 2.

page/form 2 provides 2 fields which are selected with a slider, these are passed to page/form 3 via POST.

page/form 3 displays the vars as expected, essentially displaying the total inserts requested on page/form 2
Insert of the multiple fields works a treat! but the vars are no longer posted.

The 4th and final page/form is not displaying the total selected insert fields or the db data, which is both taken from var posted from page/form 2-3.

If I change page 4 to page 3 it works, so the vars are getting lost on insert of the multiple fields......


Any help would be great, am really in need of a solution for this as I have another 100 such forms to create.

I have a attached the 4 forms for viewing.

Any helps is greatly appreciated.