PS: don’t know why you are using “echo do_shortcode” instead of just the plain shortcode on a page…but that’s up to you. just wondered

sounds to me like you are putting a loop into a loop

i would suggest you first just put the shortcode on a page as opposed to using

<?php echo do_shortcode('[wppizza category="!all" ]'); ?>

in a template somewhere and see what happens

have you tried just putting the plain shortcode on a page somewhere ?
(i.e create a page and put [wppizza category=’!all’ ] in the content area and save)

(ps: that shortcode is a loop in itself by the way – i .e it loops through items in category(ies))

I said a couple of things in private above.
in short though, i would need to know what the original theme is your customised version is derived from to see if this issue is there too or just in the customisation

how is your code js ?

in any case, i used a non customised version of your theme and it works fine.
if this really were the case / a problem, i am sure i would have heard from other about this by now…

if someone else reports this too, I shall check again – nobody is perfect – but as it stands i can’t see anything that needs fixing my end

There is a bug when i use the !all function too
I have to use the categories=’individual,categories,toprevent,theloop’