Why he hasn't delete my number?

Anonymous
Two months ago my ex broke up with me. We were having some problems and one afternoon I got a text saying "I was thinking about it all night and I think is best if we don't see each other anymore, it sucks but it's the truth, I'm not gonna yell or scream or anything. It's over."

So I replied but he never responded. Two days later out of my eagerness I sent him an e-mail, an e-mail he never responded. So since then I left him alone. But yesterday he sent me a "re" of that e-mail and he was like "I just want to wish you an early happy presidents day." But I didn't responde. And today I got a text, I didn't know it was him because I had already deleted his # a few weeks ago but I knew it was him because he was like "I hope you have a wonderful presidents day, I'm not sure if you got my e-mail."

So why the hell does he still have the e-mail I sent him and my number in his phone since he didn't want anything to do with me anymore?
Updates
+1 y
Thank you very much :-)
Why he hasn't delete my number?
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