Cape Town - Despite grabbing an early lead through Oupa Manyisa, Orlando Pirates lost their Absa Premiership tie 2-1 to Bloemfontein Celtic at Orlando Stadium on Tuesday night.
One goal in each half from Mthokozisi Dube and Tshepo Rikhotso ensured Siwelele moved to the 12th spot with 15 points from 14 matches.
With both sides having started on a high, it was the hosts who found the back of the net when goalkeeper Patrick Tignyemb and defender Wandisile Letlabika failed to communicate allowing Manyisa to easily score in the ninth minute.
Siwelele nearly responded a minute later through Khethokwakhe Masuku's fine strike, but keeper Jackson Mabokgwane made a fine save and concede a corner.
In the 21st minute, Celtic were awarded a set piece and the delivery found Rikhotso unmarked in the box, but the defender's header went over the bar.
Four minutes later, Tignyemb was equal to the task to deny Manyisa from close range following a cross from Patrick Phungwayo, the keeper produced a save with his right foot to clear from the line off the upright.
It was 1-0 in favour of the hosts at half time.
With both sides fighting for total dominance, it was the visitors who troubled Mabokgwane when Deon Hotto took a shot which was saved by the keeper in the 65th minute.
Beautiful play by Lehlohonolo Seema's men in the 69th minute saw Hotto laying the ball for Musa Nyatama in the box who failed to beat the oncoming Mabokgwane, with his shot going wide.
In the 77th minute, defender Dube launched a long ball in search of Ayanda Dlamini, but Mabokgwane misjudged the ball to be going out of play and was beaten by a bounce.
However, right in injury time. Rikhotso pounced on a cross from the right and managed to beat Mabokgwane on the far post to make it 2-1.
The loss takes Augusto Palacios' side to number eight with 18 points on the log standings from 13 matches.