I reckon you probably have one of each kind where the volume is most likely an audio pot and the tone a linear pot.

Hope I got that the right way around as easiest way to describe it is one is more gradual across it's sweep whilst the other is more dramatic in the last third or quarter of the sweep.

Some store bought axes have one of each as when looking at pot values to help with a question for Dedman on what to use for P90's the Gibbo website had one of each and also differing values????

On all of my builds I used audio taper 250k for single coils and 500k for Humbuckers as they seem to work in a more manageable and useful way.

I think on the pots they may have some form of an identifying feature and seem to remember on the stock PBG ones the 'A' was audio and 'B' might have been linear and if using the pre wired Tele Control Plate bet this is how it has been set up. If you don't like it just swap it out for same value you are using on the volume pot.