OSCommerce Small Tweaks + PayPal IPN Verified Error

Having a small error on one of my online stores: PayPal IPN Verified [Completed (Unverified; As a result it doesn't notify the customer when they make a purchase and choose PayPal, and it doesn't notify them when they've paid with PayPal. plus SMALL TWEAKS: 1. when clicking on 'Administration' it only displays 6 customers & 6 orders, I'd like it to display 30 customers & 30 orders. I already have a lot of customised work in the store, one of them is to display 30 orders and 30 customers BUT IT DOESNT SHOW 30/30 on the 'Administration' page (only the individual pages) and I want it on the Administration Page. 2. I'd like a button or box installed in the admin section for each product that I can check the box or click the button to have THAT ITEM display on the front page (instead of just the newly added products) so I can have full control over what's on the front page. I STILL WANT IT TO DISPLAY NEWEST PRODUCTS, but I want the option to set products to display there.... if I set all of the products to display there, then I guess the newest products couldn't because it's full. But must still display the newest products and give me the option to display the ones I want there.