[Tilesathome] Duplicates?

[Ed Loach]

All the tiles I've rendered recently have been recently rendered by someone else based on a request at exactly the same time, about 10 or 11 hours ago. Surely this is unnecessary repetition, until a new request is received.

e.g.
http://tah.openstreetmap.org/Browse/details/tile/12/1559/2298/
Schoos and I both rendered based on seemingly the same request (2 hrs 10)

http://tah.openstreetmap.org/Browse/details/tile/12/1557/2283/
SabineSW and me (11hrs 32)

I've just started
http://tah.openstreetmap.org/Browse/details/tile/12/2125/1385/
that bigbro has already finished (request 11hrs 34 ago)

Is it just me? Or is this to do with the lock changes not quite working perfectly?

Ed