Rangers' bad week got even worse with a home loss to Kilmarnock in the SPL on Saturday, while Dunfermline remain bottom.
Kilmarnock did the double over Rangers after Dean Shiels notched the winner with an 18-yard effort in the 12th minute at Ibrox.
The Scottish champions - who were docked ten points earlier this week after going into administration - then saw Sasa Papac sent off two minutes before the interval for violent conduct.
Ally McCoist's side could not get back into the game in the second period and now trail Old Firm rivals Celtic by 14 points, having played a game more.
Third-placed Motherwell beat Hearts 3-0 at Fir Park to draw to within six points of Rangers, with a game in hand.
An Andy Webster own goal sent Stuart McCall's side on their way, with efforts from Jamie Murphy and Nicky Law sealing the points, although the home team had Keith Lasley sent off for a second bookable offence.
Dunfermline remain at the foot of the SPL table after Inverness Caledonian Thistle's Nick Ross equalised Joe Cardle's opener.
Jim McIntyre's side are now level on points with Hibernian at the bottom, but they have played two games more.
Dundee United and St Mirren shared a goalless stalemate at Tannadice.