If it's just a little bit like maybe a few teaspoons then nope you're all good. If once you tuck it over the wheel hump it's continuously running out then there might be something wrong. I can't see how it would leak much since it only draws from the reservoir when the pump is activated. If it bothers you though just tuck an old rag around the end and between the carpet and tub where it can't blow out. You should be good though.
Joe