Being baptised in the Particular Baptist Church in Westoning does not necessarily mean the person was born there. People often travelled miles to their particular flavour non-conformist church. Here's the 1851, which I assume you haven't seen
HO107/1755 folio 320B
Dunstable St, Toddington
William Thackry head marr 57 currier b Middlesex Holborn?
Sarah Thackry wife 56 b Wellingborough Northants
John Thackry son unm 27 Currier b Eversholt Beds
Timothy Thackry son unm 24 currier b Eversholt
Caroline Thackry dau unm 20 b Eversholt
Naomi Thackry dau 18 b Eversholt
Rebecca Thackry dau 16 b Toddington
So in 1841 they should have been in Eversholt, but I can't see them. Eyes are crossing. I'll have another try tomorrow.
Regards
David