Indexes and transcripts are useful as finding aids, but they are seldom or never an adequate substitute for looking at the original records.
The drop-down menu on the website uses just six words to sub-divide the village: "Village Centre, Tathall End and Long Street".
This is clearly a significant reduction from the descriptions in the orginal records. These can be viewed on a number of websites. (One or other of findmypast.co.uk or ancestrylibrary.com are usually available free at public libraries).
Hanslope comprises Enumeration Districts 9 and 10 of the Olney Subdivision of the Newport Pagnell Division of Bucks.
The full description of ED10 as given in the original ED summary book reads:
All that part of the Civil Parish of Hanslope consisting chiefly of outlaying Farms and Cottages as described in detail below. Comprising Newport Road (from the Feoffee School) Woad Farm and Cottage Yewtree Lodge, Tathall-End, Park Farm, Hanslope Park Park Lodge, New Buildings, Leamington Cottages, Hatton Court, Hatton Court Lodge, Bullington End, Manor Farm, Ivy Farm, Park Road (from the Vicarage) Cuckoos-Hill, Malt Mill Lane, Rectory Farm Cottages, Milford ??? & Cottage, Lincoln Lodge and Cottage Hungate End Grange Farm, Pindon-End Farm and Cottage Gordons Lodge Whitings Farm, Higham Cross, Steam Mill Badgers Balney and Green-End.
So the census itself does not say that Malt Mill Lane is in Tathall End. I suspect that it is the reduction from around 100 words in the census to the 2 in the menu on the website that has mislead you.