Probably right, Hetty. Growing in sub-tropical or tropical climates can be vastly different than growing in temperate climates.
Cheryl, if the potted plant is top-heavy, move to a larger and/or heavier pot. As long as there is room for the pups to grow adjacent to the mother plant, pot space should not matter. Most bromeliads have very little root formation, generally only enough to anchor the plant. I have found that when mounted, particularly on a porous surface (old soft woods, natural cork, etc), my bromeliads actually grow a stronger root structure. That's probably because the roots are more important to support the plant. Ken