Oauth, authenticate and permissions


So, I’ve seen many questions regarding authenticate and r/w/d permissions. My problem is ‘simpler’?

I am trying to pass myself through an authenticate flow for r/w permissions and I’m getting asked for authorization every time. If I just use R permissions it works. I have gone through the authorize flow, and its worked. What I want is when my users have logged in already, and have already authorized the app, I want it to pass through to my webpage to post, rather then re-authorize.

I should add, that after authorizing or if the permissions are set to ‘r’, i get passed through to my website as expected. Its only r/w. And again, I do not need dm.

Everything I’ve read seems to indicate this should work.

Any thoughts on what to troubleshoot?