Dell just fixed the problem for me. They updated the correct warranty period for me.
I purchased a Dell U2417H monitor on May 19th, 2021, through Amazon. I cannot get Dell to update my warranty to reflect the start time as date of purchase. It still shows the original Dell warranty from it's original shipped date. The U2417H was purchased new from a company on Amazon and they it sold to me as new. I have the purchase invoice proving this. I already successfully transferred ownership to me through Dell. How do I get Dell to update my warranty? I've tried calling Dell, but get nowhere with the folks who answer. Really POOR customer service.  
U2417H, Amazon purchased, Dell warranty not being updated