I think I've found a bug, unless this is intentional.
Recently I've noticed that whenever times are uploaded, even it the career.blt file contains previously submitted times, it updates to timestamp as though it's a fresh submission. Not the end of the world, just an observation.
Now, yesterday and today I've noticed, if I resubmit a slower than previous time. (IE, fresh installed/cleared cch files/new player folder/etc) it overwrites the previous better time.
For example, I've been revisiting my previous personal bests to see 8f I can improve on them. Two of my recent ones were the ISI F2 at Malaysia South, and the 2010 Clio Cup at Mills Outer A.
Both of these I've not been able to improve on (but that's another issue!) but they are pulled into the career.blt file they are seen as lap records, then are added to the database, overwriting my actual best.