[Lizard]

It shouldn't keep coalescing from happening, you just won't get quite as much coalesced.

For example:
Day 1
9:00 sync all 3 clients -- 15 .zip files on server
10:05 sync all 3 clients -- 18 .zip files on server, deleting all client files before 9:00
10:10 sync 1 Mac -- coalesce brings you down to 4 .zip files

Day 2
9:00 sync all 3 clients -- 15 .zip files on server
9:30 sync iPhone -- 16 .zip files on server
10:05 sync all 3 clients -- 19 .zip files on server, deleting all client files before 9:00
10:10 sync 1 Mac -- coalesce brings you down to 5 .zip files