Chelmsford City will face Salisbury City in the Blue Square Bet South play-off semi-finals after ending their regular season with a 3-1 defeat at Farnborough.
The first leg will be played at Melbourne Park on Tuesday night, with the return in Wiltshire next Saturday.
The Clarets needed to better the result of the Whites to secure a home leg second, but the Kent side thrashed Bromley 4-0 to secure third place – and Eastleigh's 1-1 draw at champions Welling saw them overtake the Clarets and leave the Essex side fifth.
Clarets boss Glenn Pennyfather took the opportunity to rest a few players, but will have been disappointed to see his side's four-match winning run ended against a side in administration, with an outfield player in goal and who finished the game with ten men.
Jamie Slabber, who has missed the last two games with injury, grabbed City's goal after coming on as a substitute.
Elsewhere in Blue Square Bet South, relegated Billericay Town ended their season on a high with a 1-0 win over Maidenhead United.
Jay May struck the game's only goal after 17 minutes.
In Ryman League Division One North, Maldon & Tiptree and Witham avoided each other in the play-off semi-finals after both drew their final games 2-2.
Maldon came from 2-0 down at Wroxham thanks to a brace from Ollie Berquez and will now face Aveley on Tuesday night, while Witham twice trailed at Potters Bar before hitting back to draw. They will travel to Thamesmead on Tuesday.
Ryman League play-offs are one-off games, and the final will be played on Saturday at the home of the highest-placed team.
Brentwood lost 3-1 at home to Romford, while Heybridge Swifts scored twice in the last three minutes to draw with Ware.
