Moyale scored through Gastain Simkonda while Juma Yatina's hat-trick ensured three points for the security men with Hassan Mukoko grabbing Nchalo's consolation goal.
Moyale heads back to Mzuzu with four points having restricted Kamuzu Barracks to a barren draw on Saturday.
Nchalo United will go back to Chikwawa empty handed having lost 0-1 away to Silver Strikers on Saturday.
At Mangochi Stadium, Tigers FC salvaged a point after restricting Red Lions to a one-draw. The home side netted through Moses Nankumba (penalty) while Jafali Maunde scored (penalty) for Tigers.
At Civo Stadium, Civil Sporting returned to their winning ways and claimed a 1-0 win over TN Stars. Fletcher Bandawe scored the match's lone goal.
In other games played on Saturday, Karonga United claimed a 2-1 home win over Mafco FC at Karonga Stadium. The home side netted through Khumbo Msowoya (brace) while Patrick Luhanga reduced the arrears for the Salima based side.
Mzuni FC thrashed Dwangwa United 2-0 at Mzuzu Stadium. Michael Tete and Maxwell Gasten netted for the home side.
Silver Strikers and Civil Sporting have since moved up to third and fourth positions with 40 and 30 points, respectively.
Defending champions Be Forward Wanderers and Blue Eagles climbed down to third and fifth positions, respectively.
Wanderers, who were exempted at the weekend for contributing over three players to the Malawi National Football Team, have 39 points while Blue Eagles have 29 points from 20 games each.
Tigers FC and Masters are tied on 27 points from 20 games each but the former have a better goal difference and are on sixth position on the log table.
Karonga United and Moyale are equally tied on 26 points from 21 games each, but Karonga United are above the military side, thanks to their superior goal difference.
The week has also seen Kamuzu Barracks moving down from position eight to 10 with 25 points from 20 games whereas Red Lions are on eleventh position with 24 points, from 21 games.
TN Stars have climbed down to position 12 with 24 points from 20 games with Dwangwa United perching on thirteenth position with 23 points from 20 games.
Mzuni are on fourteenth position with 21 points from 21 games while Mafco are second from the bottom with 16 points from 20 games. Nchalo United are anchoring the log table with 12 points from 21 games.
Nyasa Big Bullets, who were also exempted for contributing players to the Flames, top the log table with 46 points from 20 games.