Sounds like you need to find a new "professional", or learn to do your ownrefletching. I have NEVER had a vane come off an arrow in 7yrs of using a Wisker Biscuit. I have been doing my own fletching and never a problem. A drop of glue on the leading end of the vane helps also.
The Biscuit seems toget blamed for a lot of the wrong reasons. If it's set up properly and your bow is tuned, andarrows are fletched and tunedproperly, you're going to shoot well with a WB. I use just a slight off set with my vanes, not veins.