Energy firm Cuadrilla is seeking planning permission to drill, hydraulically fracture and test the flow of gas from up to four exploration wells on the sites in the Fylde area.
Councillors at Lancashire County Council were due to make a decision on both applications next month, with drilling likely to start early next year if approved then and fracking to follow several months later.
But now planning officials want the decision deadline to go back to December 31 for the proposed site at Preston New Road in Little Plumpton and to January 31 next year for the similar site at Roseacre Wood in Inskip.
Test drilling was suspended in the Lancashire's Bowland basin in June 2011, following two earthquakes in the area in April and May of that year, one with a magnitude of 2.3 and the other 1.4, with the epicentre thought to be about 500 metres away from a well in Weeton, Lancashire.
From fuming fusiliers to the people fighting fracking, our Political Reporter Daniel Hewitt looks at all the issues and debates that are dominating the political landscape in the North West this month.
Watch tonight's edition of Party People at 23:45 on ITV for more debate and reaction.