Well I deleted the extra road (Having curves on the intersection boundary does not warrant two separate road segments), as I think it was out of date. The turn restriction that is tagged on the current intersection, is, I believe, no left turn from Calcherty Street onto Stratford Parade - which is a small segment that presumably doesn't exist - becoming Kamerunga Road. Trying to remove that segment can't be done without removing the turn restriction relation. 
So my question is, is there no left turns from Calcherty Street onto Kamerunga Road (Is the latter one-way? And what did you mean by a right turn from Calcherty onto Kamerunga...) so should there be a different setup of turn restrictions, or none?