You've basically got 2 bits of 2.5mm in parallel (usually unequal lengths), feeding a single bit of 2.5mm. 32A MCB.
Whereas if it was a standard radial circuit, you'd have just the single bit of 2.5mm, and you'd only be allowed a 20A MCB on it. (IIRC they even dropped the 2.5mm rating down to 18A, which is "correct" in accordance with the calculations, but then increased it back to 20A because that's what everyone does anyway).
I'm not worried. I just don't see the logic.
I have 10cm of 2.5mm T+E protected by a 40A MCB on the cooker circuit (feeding a socket that can only supply the gas hob ignition) and that seems very wrong too - but wiring a socket in 6mm is just too painful. However, the cooker circuit may yet drop back to 32A (because I suspect that's all it needs) which makes it no worse than the socket spur discussed above.