So fuelling's fine 99% of the time but i've noticed a couple of times where it overfills.
https://igpmanager.com/play/?url=race-result/49413 (Alves, same problem with Anderson apparently)
For example today, originally planned two stops so in the pit strategy menu on 2D, it had my three stints showing. Had to make a stop on the first lap to change tyres, refuelled the same amount of litres as i told it to, so instantly it showed me being on my 2nd stint. Later on pitted again a lap early to change tyres, again fuelled the right amount, showed me as being on my 3rd stint. The problem arises when you've used all your original stints like that and you try to stop again and set the fuel level. For my last stint i used the pit strategy menu and selected :Full Wets :25L. Instead, it put in the same amount of fuel from my last stint, about 15L more.
Again, this only ever happens when you've already gone through all your original stints and then try to pit again.