Use of prime causes compounding ammonia readings but binds actual free ammonia, have you used it
Also, interestingly based on your two weeks timeframe, I bet your tank is cycled and can demo that in an ammonia test but you'd have to run it a different way, your current water table is poor for testing. You'd change it all back to known zero
Wait another day then take ammonia reading in what you are certain to be zero ammonia water. This color it reads is calibrated zero.
Dose liquid ammonia in tiny increments, until a water test shows your ammonia slightly risen, say one ppm. A tiny bit only.
Stop dosing
Wait twenty four hours and retest, it's back to calibrated zero and is proof you are cycled (ammonia performance and submersion time are what closes a cycle, no other testing required)
The microbiology of cycling thread says no level of ammonia you accidentally spike is going to harm your cycle, so that's why the stated 8 ppm isn't an alarm. It's either prime or a quad dose from the start, which isn't harmful. The thread also states at three weeks cycle is done using known boosters like bottle bac and ammonia so your two weeks puts you just shy of the timeframe. The timeframe was written conservatively lol I bet your tank passes a calibrated test. All chips in leave with entire weekend comped vegas style bet it'll pass.