Hi Sam !
Since the original post was made Feb 19, the matters discussed may be "out-of-date" by now, but I'll give it my 2 cents worth anyways ...
Besides comments already made, I must say I really like the images. Cool, "minty" freshness that enhances the products i m o. Very well done !
About the symetry probelm - do you think it may be an "imperfection" in the very bottle itself ?
Anyways, I had a very quick go at it (and I hope you dont mind) with simply duplicating the bg layer, making an irregular selection with the Lasso tool, rotating selection with Transform and pivot point in the left upper corner of selection, followed by a bit of Clone Stamp to finish it off.
As said - very quickly done and not with any intention of being any quality work. Just as a suggestion ...
On the Hi-Res image one could also perhaps "stretch" the inner bottom a bit to the right to center the dark, disc shaped area more.
Jgraph designs - Retouch and Image editing