In an attempt to save money, Lancashire County Council have merged Certificate Services, which used to deal with the registers, in with Lancashire Archives at Bow Lane.
In turn, the Archives are no longer open 5 days a week. Maybe the staff there are handling certificate requests on the days when they are not open to the public?
The LCS section of the LCC website still claims you can order in person on Mondays, but I bet the door will remain locked.