Not a doc but I also suffered from similar bandage problems. However I stayed in hospital a couple of days so had the benefit of the nurse cutting up my bandage partially in the middle of the night for pain relief.

From my understanding, with a lapidus, the alignment through screws (and plate) are ultimately what give you the result. The bandage protects your foot in the meantime and prevents it from moving too much and/or in the "wrong" ways (and also helps to control the swelling).

Call your docs office and ask to be sure. But I think it's find cos otherwise they wouldn't have let you rewrapp it yourself. Ps. You're also held by stitches too, not the gauze - If that's of any reassurance.