They should flip (roll) in and out when opening and closing the slide.
Often times when the seals are lubed well and the sides of the slide are well waxed, the seals do not flip. It has nothing to do with alignment and everything to do with friction.
There have been mods to install an automotive type moulding to the side of the slide to flip the seal.
I often 'help' mine when they don't flip with a broom handle or an old awning pull rod I still carry.
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.
Days Camped: '18=51 ☼ '19=58 ☼ '20=110 ☼ '21=94