Word for working with two parallel work instruction system in a company

If living two lives, one for outside world and other in the closet is double life.

What would you call preferably pejoratively for when employees are working with two procedures rule book & guidelines in parallel as in, one from the previous (departed) owners of the company (recent as between 1-6 months) and other from now a new procedure guidelines/instructions from the new owners after a takeover.

Example: In order to meet the daily requirements of the company, the employees themselves have to work with ___________ (parallel systems) to suffice the company commitments since the new management has simply dumped their existing system from their other company on these employees, which is tough to execute in order to do daily business while there has never been a familiarization or transition process.

It is as though a equivalent of “living double lives” but in the company’s procedural work instruction business sphere.