This is normal and a good thing.The sail is wrapping around the furler nicely as long as I put some resistance on the sheet.
These are possibilities. The bearings could be worn or dirty. A new sail or one with a foam luff can be difficult to roll for the first couple of turns until the foam is rolled up. This is due to the stiffness added by the foam. My new laminate sail was a bear to furl until I let it get beat up a bit, then it got easier. Sometimes you just have to beat these things into submission.I suspect the overall resistance has to do with the weight of the sail and/or bearings of the furler. There appears to be no more binding. The resistance is consistant