Indent after MC?

I had a MC just over a month ago and I had my blood taken to make sure levels went back down and even took multiple HPT and they were negative but now I’m 11DPO and have been testing everyday since 9dpo and every single test I take has an apparent either EVAP or indent line.. they show up right away as it’s drying and looks so much like a positive and then once it dries it turns into a shadow...I’m just confused!!! This is the one I just took. Maybe it’s just me but you can clearly see it in person.