Now let it b any loco!! P-5/P-7 or anyone. until unless the designers find a clear path for this train across all major junctions, we can't help.
Some trains have olden timings so they can b altered for few mins. but when such specials are introduced, its like messing up with the daily ones n weeklies. that's y Specials are meant to b lil slow than the regular runners. Don't worry, its for few months.