re 1) that codesnippet already exists

https://support.wp-pizza.com/topic/send-email-on-admin-status-update/

quick fix re 2) – in your themes functions.php

add_filter( 'wppizza_filter_print_order_single_item', 'myprefix_add_ingredients_items_linebreaks');
function myprefix_add_ingredients_items_linebreaks($item){
	$item['addinfo']=str_replace(', ','<br />',$item['addinfo']);	
return $item;
}

in short:

if i were to take on customisations, development of the plugin and extensions/gateways would stop dead right here

i am already spending way too much time dealing with stuff that has nothing to do with the plugin in the first place or indeed providing/writing codesnippets so someone can do something that is not in the scope of the plugin.

there are – quite literally – millions of developers out there that build and customise wordpress based websites to your exact specifications. I’m sure you should be able to find one somewhere that can do what you want to do

you can do all of that (and more).
just create custom groups as required

i know of that bug, but cannot ever reproduce it (i have heard about this about 3 times now)
in anycase, try “repair categories” in wppizza->tools

it’s a tab at the top in the extension (at the top) labeled “how to”

localization is where you should be looking. just delete the text….

create a new custom group -> set type : exclude and select it there (you’ll see what i mean i think) (v.4.7+)

>Is it possible to send me latest jquery version?

huh ?
just download wordpress again and copy it from there…

>if there is any other way to exclude all subcategories and print only parent categories…etc etc

it’s a normal custom post type, do as you please (or go to appearance -> menu and just do one of those selecting the categories you want.)

>bug the i have found in “wppizza-loop.php”…

how is that a bug ? it does do what it is supposed to be doing. only that *you* want it to do something else. in any event, it’s a template, so if you want to it to do different things, feel free to edit as required…

sorry, but you cannot do that. you will break things somewhere sooner or later (wppizza or elsewhere).
if something doesnt work with the jQuery version comes with wordpress you’ll have to investigate what and why that is.

my first port of call would be to disable all plugins and use a default them e(twentytwelve for example) and then see if that issue still exists. if it does not , turn on plugins one by one until it breaks (and or the theme)