If they are quoting this verse in support of what they claim as the condition of their saints, then they are misquoting it. If there were no corruption, then the bodies would be in perfect condition.
Not mummified.
Not atrophied muscles.
Not patches of mold and mildew on the skin.
Not patches of skin missing.
Not salts covering the body.
Those are ALL signs of decay.
Those are my thoughts, too.