How do I avoid having my revenue taxed twice by the IRS?

I do affiliate marketing for a living.  The commission payments get transferred into my business PayPal account and the various businesses also send me a 1099.  Normally I would just list the 1099s on my tax return, but this affiliate revenue is already taxed when I enter the numbers off Form 1099-K that PayPal sent.

 

Now the IRS is saying that I failed to record these other 1099s that I received, which is technically correct.  But I didn't do so because I didn't want my affiliate commissions to be taxed twice.

 

If the money is already accounted for on the 1099-K, then why do I also need to note the individual 1099s that I get from these marketing companies?  Again, the goal is to avoid double taxation and make sure I'm doing everything correct.

 

Thanks!