The Wells suffered an injury time collapse to leave the Community Stadium with an 11th league defeat of the season.
Jon Pilbeam gave The Wells the lead on 32mins from the penalty spot after a hand ball in the Crows area.
Despite Wells strikers Nwoko and Biddlecombe going close, The Wells were unable to add to their lead.
Crowborough pulled out an unlikely win when they netted late into injury time through Tom Phipp and Dan Perry.
The Wells remain in 18th, 5pts behind Rusthall in 17th.
Next up The Wells host league leaders Sevenoaks Town at The Culverden on Saturday.
Kick Off 3pm.