Here's the thing, they've tried to fix it so ride them if you're comfortable... but for fucks sake don't go pushing it 100% until you're positive they're safe.  However, if they aren't safe and/or the mount fucks up within 10-15 days of riding, you better be in that shop getting new skis.
I've had a mount rip out in 20 days of riding and though it was a fucking headache to deal with and took almost a full season because the shop was trying to get out of it.. I got a new pair of skis.  I shit you not though, I had to get Armada's techs to look at the skis, tell me exactly which holes were drilled wrong, send my skis back to me at which point I had to document in detail everything... pictures, measurements, etc.  Only after sending a in depth PDF of the "report" and threatening to get lawyers involved did they finally offer new skis.
Then again I've also had a shop give me new skis on the spot after mounting a pair of at like, -30 from center (back bidings were literally on the tails).
One more point, everytime you redrill in a new spot, the old mounting holes become the weakest point on the ski and are by far the most likely place for skis to break in the park.  I did my senior engineering thesis on ski failure and this was one very obvious thing that stuck out to me.  Those "plugs" they put in just keep water out and do pretty much nothing for actual strength.  So ya, if you have to redrill a barnd new pair of skis because of a bad mount, you should just get new skis.