The reason why the person tested postive afterward is because he voided out all of the fluids that he took in.

Remember now - he stated he took "several" home tests before the "real deal" . So the total amount of voids (between the time of his dilution regime to the time he tested positive after the "real deal") add up to more than 4-5.

It must be understood that dilution techniques (in any configuration) are only temporary. Once all of the fluids consumed had all been urinated out (as it obviously happened in the O/Ps case), a "dirty" donor will resume testing positive for THC because the bladder is replenished with fresh THCA-laden urine by the kidneys.

Lesson? When utilizing dilution techniques and testing yourself several times before the "real deal", make an effort to replenish the fluids that youve voided out for your home tests before going to the test site.