EI-BUD
During the process of uploading the new schedules, not everything is uploaded at once. Therefore there are always be contradictory schedules for any particular aircraft.
Believe us: the 1255 LGW flight WILL get rescheduled to 1450! We all know it still says 1255 on the Ryanair website for May. But we also know from experience that Ryanair often put summer flights on sale with winter times before the summer schedule is ready. Then when the summer schedule is ready there'll be 1, 2, even 3 weeks of chopping and changing of the online schedule before the new schedule is fully clear / available.