Faint positive on Easy @ Home test but negative on others

I’m currently around 8 - 9 DPO of my first month TTC. I’m 37, so wasn’t expecting it to happen right away. But I started to get some signs that maybe I had some hormonal changes, so I took an Easy @ Home pregnancy test. I had a very very very faint pos. The next couple days, I re-tested and it was a tad darker. I then took a Premier Value brand test this morning (drug store brand) and it looks negative. Anyone else have this experience? I started to wonder if maybe the entire Easy @ Home batch was faulty so had my fiancé test (imagine his face when I asked him to do this...!). The top test in the photo is his negative result (clean white)

. Followed by my test around 6 or 7 DPO then 7 or 8 DPO then again at 7 or 8 DPO then finally today at 8 or 9 DPO with the drug store brand also included.

This photo was taken around 15 mins after the final tests.

Thoughts???