I think Julep is taking on WAY too much at the same time each month. They used to do mystery boxes in the middle of the month (around the 8th-12th), now they are doing them right around the monthly boxes AND secret store. Plus they've been opening up the secret store earlier, having it open longer, AND opening it up for everyone (not necessarily a bad thing, just more orders to fill along with getting monthly boxes out and doing mystery boxes too). Not to mention this is the first month of the customizable boxes so it's a learning curve on how long getting the boxes out will take now.
They should really go back to at least doing mystery boxes a couple weeks after everything from the maven window/secret store is out. Not just from a timing standpoint but a lot of us don't have the budget for monthly box + secret store + mystery box all in one week either.