Are laptimes reliable?

Hello everybody!  
Are the Laptimes in the app reliable? I'm not saying that the app doesn't work nor that it doesn't record times properly.
I mean, is there the possibility to change the car power output? I already saw some videos where guys are creating their own cars.
And if there is the chance to do so, is the app checking also that the car is in it's "original version" (assuming it can be done)?
Otherwise there would be not that much enthusiasm by my side in competing.
For instance at Imola there's a dude named gitu, lapping 1.31,5.... FOR REAL???  

In some cases the app wrongly send the car/track of the previous session. We are currently implementing a new way of handling this, and we will release a fix for this. We will also made the app incompatible with the current version, so everyone will be notified that needs to upgrade.

Unfortunately this never happen to us during the testing phase.

Thanks for your help and support

Regards this issue Andrea, the #1 ranked time for Mugello/Ferrari 458 Italia is wrong.

TomasT tried to register here to report it but forums won't allow him for some reason.

He was running Vallelunga / BMW M3 E30 Step1 and his 1st lap recorded OK, but when he did his 2nd lap it recorded as Mugello / Ferrari 458 Italia so the Mugello/Ferrari time needs removing (or if possible amending to Vallelunga / BMW M3 E30 Step1 which it should have been.

You will see it is wrong to be Mugello, as the final sector is totally wrong and probably an impossible sector time to achieve.

:-)

thanks for reporting this. time removed. this might still due to the issue we fixed yesterday (in fact the time was set on the 2013.12.08. 22:00