Why would a guy keep you on Snapchat even if he deleted you on Instagram?

Guy told me he was still mad at me about something which o didn’t agree with and frantically deleted me on insta and WhatsApp. I also checked Snapchat and was surprised to see he didn’t delete me there so I did it myself. Wtf is going on?
Why would a guy keep you on Snapchat even if he deleted you on Instagram?
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