What is the reason for Daily WS to automatically change from 1234 to 4231?

We person built a WSR for circumstantial employees with Daily WS '1234' displacement clip 1330-2300 however, upon checking it abruptly changed to '4321' displacement clip 1300-2300. We are decidedly definite the requirements is '1234' and has been inputted accordingly. It lone happened connected a fig of week, similar Week 7, Week 9  and Week 10 of 30 Weeks roster.

Is determination a mode to recovered retired wherefore it abruptly changed?