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`Args.getDefault(int)` and `Args.getKwDefault(int)` are indexed by argument position (with gaps for args without defaults), not by default position. The CFG `getChild` predicate for FunctionDefExpr and LambdaExpr therefore had gaps at low indices and collisions where defaults and kwdefaults overlapped, producing parallel edges before the FunctionExpr. Use `rank` to compact-renumber `getDefault(n)` and `getKwDefault(n)` in source order. Verified on a CPython database: removes ~536 `multipleSuccessors` consistency results (1340 -> 804); the rest are `for/else` and `while/else`. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>