I don't think I've ever noticed that problem and all my sporrans have tassels. Maybe it's a matter of experimenting with the height/location of the sporran. When I look at some of the posted pictures, I would disagree (to myself) with the placement.

BTW, one of the funny trivial things I've come across in my life is that tic tac, as I know it, is sold in different colours according to the country it's in. We're all talking about the same thing: it's white in Canada. I wouldn't use it for this.