Yup, it's super weird.
Question: Sounds like you opted out of Google signing technology? If so, did they make you upload a signed APK? Or could you upload one in debug mode?
I'm using Cocoon to build my apps. There I uploaded my keystore file. Then I get a already signed apk file which I upload to the play store.
Yup, it's super weird.
Question: How did you do your signing? I know how to do it via Adobe Phonegap with the self-generated JAVA key, but that may be part of the problem also. There's something called Monaco out there which claims to be able to do signing for you? Not sure I trust it though.
Like mentioned above I do sign my apk directly at Cocoon. Before I used "APK Signer". It's a free tool available here.
https://shatter-box.com/knowledgebase/a ... pk-signer/
Hope this helps you.
Regards
Andy