PTSD increase decision 2 days after evaluation/was evaluation required/when does the rating update after decision letter sent

Hello again.  I’m posting this to a new thread although its related to a post of two days ago. 

I just had my C&P exam on 16 Feb for a PTSD increase.    Based on my claim status online which I just checked this morning, 18 Feb, the VA sent a decision letter and closed the claim.  Is it possible for the VA to reach a decision this quickly after an evaluation?  This claim was submitted as a fully developed claim and the only other evidence I had in my file was a DBQ and narrative or nexus letter prepared by my treating doctor of 11 years. 

I’m enclosing a screenshot of a status that I asked the VA about twice and received two different answers.  I asked them if an exam was required. The status on the screenshot says no longer needed. In one call the VA said it was not required.  In another call they said it was required and provided me LHI’s contact information.   The exam was scheduled and conducted through LHI.    

Has anyone dealt with this type of inconsistency?  Is it possible the VA made a decision without this evaluation considering how fast a decision letter was sent after the evaluation.  Or do you think the evaluation was considered in their decision?

I contacted the VA this morning and the rep said he cannot discuss the contents of the decision but confirmed that an exam notification was sent out back in January.  I also asked him how long it takes ebenefits to show the new rating if the decision is for an increase.  He confirmed for me my rating he sees now but this rating is my current rating.   How long does ebenefits take to update a rating that may have increased after a decision letter was sent?

Thanks

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