PPC conversion tracking and DLGuard

Hello everyone hope all is well! Let's talk about conversion tracking for PPC and using DLGuard.

Conversion tracking:

Does anyone else have problems with ACCURATE conversion tracking using adwords,yahoo, or msn tracking code? My conversion stats are almost never accurate. Let's say for instance that I get 10 sales on one of my products. Well when I log in to check my stats adwords might tell me I had 6 sales that day or 13 sales that day, it's always under or over but never right on...very frustrating because that screws up the EPC on your keywords! I understand that some people might buy and then not download the product right away but my main concern is when the tracking is OVER the actual sales. This could make a keyword that is in fact not profitable look profitable. Anyone else ahve this issue and has anyone found out how to fix this problem?

DLGuard:

I like DLGuard but one thing that really gets annoying about it is the amount of people that cannot download the product. Everyday I get emails from customers saying something like: "I couldn't download the product" or "I have never had problems downloading something online before until now!"...you get the point. When I go to the link that is sent to them in their email, it works for me every single time so I have no idea why it won't work for others! Anyone else have this issue?

Cheers,

Kevin B.