The aircraft are not being dismantled in view of the general public, rumour has it the first aircraft will move landside from it's current position on stand 9 at some point tomorrow - only a rumour though.
Also, a contributing factor is that last years May figures include five Boeing 767 trooping flights and four Jet2.com diversions. Take those out of the equation and fair enough we'd probably still be down, but not by anywhere near as much.