Sorry if this is too much information but do you find some lubes "leak" more than others?
(Of couse by "leak" I don't mean from the bottle, but from you.)
I've used several lubes so far and usually they will only leak on the first couple of uses but then I'll have no issues with them.
I've been using this Durex one for a while and I always leak quite a bit with it:
https://www.lovehoney.co.uk/product.cfm?p=13895
I was wondering if this was because this lube is more designed for oral sex but it does say you can use if for vaginal and anal sex, too. I have used other flavoured lubes and they didn't leak like this one. It's not a big issue but it is a little annoying when I put clean underwear on in the morning and then they are soaked as soon as I start moving around. It's hard to tell the difference between the lube shifting from the night before to a period so at first I was like "Oh no!" until I knew what it was.
Is there a reason as to why some lubes leak and others don't?