Six shots is thirteen calls.

A generator produces clips of a fixed maximum length, so a shot longer than the cap is not one call. Eight seconds against a five-second ceiling is two. Eighteen seconds is four, with three joins inside a single continuous shot. None of those numbers appears anywhere in a shot list, and all of them are forced by it — the same six shots that are six calls on a twenty-second generator are thirteen on a five-second one. Nothing about the plan is wrong. It is arithmetic nobody did.

The engine is free and needs no account. Paste the generator profile and the shot list, and every shot is decomposed here: the call count, the seam count, and the split itself — balanced, because filling greedily gives 12s at a 5s cap as 5 + 5 + 2 and that last two seconds is a clip nobody can cut with, while 4 + 4 + 4 is the same three calls and the same bill. It also separates billed seconds from delivered ones, since a three-second logo under a four-second minimum bills four. Every lane ships a worked example that costs nothing. Writing the report needs credits.