Hiya all

Had an opponent's deep striking assault marines scatter onto some battlements today. There wasn't room to complete a full circle of marines,the final marine had to balance on the rim, as such he couldn't be placed in base to base.
My opponent claimed that as per the 3rd bullet point on p.36 of the rulebook "Each circle must include as many models as will fit," the first circle contained as many models as would fit and so he could start another.

I think that per page 8 of the latest rulebook faq the "entire unit could not deploy onto the battlements" and so the unit needed to roll on the deep strike mishap table.

Can anyone offer any clarification?