Achewa came from behind to draw with Alliance One whereas Incognito have displaced Michigan from the top in the Central Region Pool League on Saturday.
Achewa played a 6-6 draw against Alliance One at Sent Area whereas Incognito beat leaders Michigan 7-5.
Incognito, who suffered their first league defeat last Sunday from 20 games, have displaced Michigan with a two-point gap.
They are topping on 50 points from 21 games whereas Michigan have descended to second position on 48 points from 23 games.
At Sent, Achewa put a splendid second-half comeback to salvage a point.
At one point, they were trialing 5-2 after Salimon Nyirenda, Foster Godfrey, Daud Witness, Bobo Thewe and Chris Chazandila succumbed to the heat from Martin Maimba, Shelphus Katongo, Hendrix Chimbanga, Ben Chimala and Chimwemwe Msokera respectively.
Achewa made several substitutions in attempt to upset the tables.
The move paid dividend as they won three consecutive frames through Buju Kawola, Spear Maulidi and Miliward Saidi to snatch the lead 6-5.
Alliance One then counted the hopes of Chilungamo Mapeta to salvage a point and he did no mistake outsmarting Philip Kalenga.
In other results, FIB suffered 7-5 defeat in the hands of Hakuna Matata at Chilinde.