Hmm that's a bit of a surprise. On the one hand I trust to liquid test kit over strips, but on the other hand I'd be a bit surprised if your tank was completely cycled in 2 weeks time. I'm not saying it's not possible, I'm just a hobbyist, but mine took twice that long even with bottled bacteria. But I didn't use the same brand as you, mine was a few years ago now, and every tank is different. I'd probably just keep testing over the next few days and if results are consistent then you're probably good.
I did have an experience many years ago when my lfs kept telling me my phosphates were through the roof and I kept trying to fix my tank through large water changes, phosgard, other carbon media, etc. and they kept coming back saying it was still way high. Eventually I took in 2 samples, 1 in the same little tupperware I had been using for water samples for the past several trips, and 1 in a ziploc bag. The plastic tupperware water tested high, the ziploc bag was completely normal. I had grabbed the tupperware out of the garage just for transporting water to the lfs, and have no idea what was in it long before that had seeped into the plastic, but even after heavy cleaning and soaking with dishsoap and very hot water it would still affect testing after water had been transported in it. Long story to say that sometimes you could both be right but it may not be a tank problem. My tank was fine the entire time and I'd stressed and bought things I didn't need to solve a problem I didn't have. Also taught me to have supplies dedicated to the fishtank that were never used for anything else.