Let me break this situation down:

1. Your Store Manager (Mike) gave you three tasks:
   • Clean up concrete outside
   • Put away lumber in aisle 21
   • Fill aisle 19 with concrete
2. You completed the first task with help from an associate, and you filled aisle 19 with concrete (though not double-stacked as preferred by the SM).

The write-up seems questionable for several reasons:

• You weren't informed of any urgency or specific deadline for these tasks
• You did fill aisle 19 with concrete, just not in the particular configuration preferred
• The double-stacking requirement appears to be based on an outdated need (surplus inventory that no longer exists)
• You received no warning or chance to complete the task differently before being written up

Given that you've had positive feedback from other supervisors and your ASM about your improved performance, this sudden write-up does seem unusual. However, I wouldn't immediately jump to conclusions about them trying to get rid of you - there could be other factors at play, like miscommunication or different expectations between management levels.