Did I say something wrong???
Basically I don't think I'm being paid for the 15 minutes I work due to the time on my schedule differing than when the warehouse starts up work.
You start when your schedule says you start.
Everyone does not necessarily start when the "warehouse" starts.
There may be staggered start times because the unload has to get the packages unloaded from the trailers onto the belts and down to the package cars. So preloaders may start 15 minutes after the unloaders.
Irreg workers may also start later, or they may start one right away and the rest 30 minutes later since there may not be that many irregs to process in the first half hour.
Bottom line, start when your schedule tells you to start. There are staggered times for a reason.
You are probably not being paid for that 15 minutes because you started yourself before your posted start time and are working off the clock.