why more than one temp file for a single rsync download?

[Felipe Alvarez]

A large file (2+ GB) needs to be transfered, but I see more than one
temp file for it. One temp file is larger than the other, but this
morning I tried to rsync again, and it DID NOT resume the largest temp
file - it resumed the smaller one. Is there an explanation of this
behaviour? I didn't want --inplace because I don't need it (I have the
disk space).
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-rw-r--r-- 1 felipe users 2137544747 2010-02-24 07:05
en_windows_7_professional_x86_dvd_x15-65804.iso
-rw------- 1 felipe users 2425356288 2010-02-25 03:53
.en_windows_7_professional_x86_dvd_x15-65804.iso.FRqmSF
-rw------- 1 felipe users 2206466048 2010-02-25 08:55
.en_windows_7_professional_x86_dvd_x15-65804.iso.H4iErJ
-rw-r--r-- 1 felipe users         90 2010-02-24 23:46
en_windows_7_professional_x86_dvd_x15-65804.iso.sha1
-
The original is
-
-rw-r--r--  1 felipe users 2501894144 2009-08-06 20:57
en_windows_7_professional_x86_dvd_x15-65804.iso
-
Why are two temp files saved here? Why did it resume the smaller one?
What should I do to avoid this in the future?

Felipe