Another problem i have with the plugin is the batch render mode, i cant find a way to create a batch to render an animation, i tried with backburner, but it gives me an error so i think the octane plugin doesnt work wit backburner.
To batch render you need to put the settings in the render settings common tab the usual way, (name.#.ext)
then set the time slider to the start frame you want, (b/c right now the batch render ignores the start frame in render settings but respects the end frame)
then either click on the 'Start / Reload Render' on the octane shelf or click the render button on Render View
and thats it. It will start to batch from the render view.
When you want to test render single frames after you batch render, I have needed to set 'Frame/Animation ext:' in the render settings back to 'name.ext(Single Frame)' or else it will advance to the next frame when the render gets to its max samples.
Happened to me a few times until I noticed what was going on.