I see nothing wrong with sighting in the way you are comfortable and confidenent shooting. I have preached for many years that comfort and confidence have more to do with shooting sucess than particular equipment. Yes, reliable equipment is important, and the Leupold line is very reliable (I own 4 myself) but if you are doubting its ability to hold zero in the field, then that may very well affect your shooting mentally.
I would check the mounts thoroughly and possibly take advantage of the lifetime guarantee by sending it back and having them check it out. The most it should cost you, if anything, would be shipping.
The middle of summer would be my choice of time to send it in anyway.
Smoky