I went trough every race with lotus in grand prix mode and it said 0 stops as default for all tracks except bahrain, silverstone and spain which where 1 stop and austrailia which was 2. Im not sure if its only the menu that is glitched or that if the tires will actually last the whole race, will try it out now.
This mod was made for Career mode, and I'm pretty certain the Grand Prix mode will have issues. Try this mod here for Grand Prix mode: http://www.racedepartment.com/forum/threads/decreased-tyre-wear-10x-flashback.75410/
Or this one: http://www.racedepartment.com/forum/threads/extended-tyre-life.75566/
I'm not sure which one works, but, they most certainly have a more natural effect than this one.