No not an attendance issue..she told us its Target's new policy....
Every district, every store, even every LOD has a different version of "Target policy." If you have excellent attendance (no late or NCNS and rarely call in) and you become ill, that shouldn't be held against you. Now, if you were to call out often because you'd rather go out partying, then that's reason enough for a writeup.
If you need a day off and the schedule has already been made, use the Swap Shift book rather than calling in. Of course, if you get sick or some other emergency befalls you, then that's different. In that case, you may have no choice but to call in, so try to do so at least two hours before the start of your shift so someone can be called in to work in your place.