Another newbie question...
I ordered a setup from Huntersfriend.. was able to group tightly from 20 yards, less tightly from 30 and on and on right out of the box
So, of course, 4 days from bow season in Vermont, I decide to change my grip on the release, and now I'm still shooting groups, but pretty far off to my left, or at least far enough that if I aim in front of the shoulder, I'm hitting dead center in the lungs (where previously, it was pretty spot on.. the bow I mean, not me

)
What I was doing initially was pulling the release with my thumb, closer to my face, completely out of ignorance.. but it worked.. then switched up to my trigger finger after catching hell from my brother, and the groups moved to the left.. does that make sense logically? I guess the distance of the peep to my face would have changed by switching my trigger finger, but should it be that dramatic, or is something else going on? And, along those lines, would you more experienced folks just switch back to the thumb or adjust the sites to the index finger?
Also, a member on here was nice enough to send me some advice via email, and I meant to thank him for taking the time to do so, but I cleaned up my inbox and deleted his email accidentally... so, to the guy looking forward to season opening in NY, thanks for the email!