Scope probably isn't messed up but your mounting system is.

One, bore sighting is about a waste. Its ok. But I tend to take the bolt out and just sight down the bore to a target. Two, you never want a scope at its max adjustments. This is the reason I like Leupold's std bases. Some don't, but you can center a scope adjusments and make adjustments to the rear base.

To center, youof course to the extremes (carefully) and then center.