A question for those of you selling leads to various networks...

I am new to affiliate programs and (fortunately) doing well for a newbie. I've started with Leadpile (whom I am extremely happy with), however I believe in testing offers and networks to check performance and not rely on a single source.

There lies the problem... I've been testing my data and driving leads to a few other affiliate networks (which for now will remain nameless) and if I send 5k messages to a Leadpile offer I get on average 300 impressions, when I've sent 5k in messages to the "test" networks I get between 4-16 impressions (mostly 4-7). I've determined that at least 2 of the 3 networks are using "DirectTrack" for tracking affiliate.

These figures have been pretty consistant and alarming. I can at this point tell when there is a "hiccup" in the system and can find no legitimate reason for the discrepencies...

Has anyone else noticed such issues?