Come up with a naming scheme for your files that will work then. Computers are stupid folks - they treat file names as strings, not as numbers, simply because they
are strings. Hence, a file named 10.jpg will come before a file named 9.jpg. There's only one remedy to this, as I suggested before: rename your files brightly before uploading them - there are many tools (I can recommend
1-4a rename) that allow you to come up with a naming scheme that makes sense: if you plan to add a maximum of 999 pics to an album, coming up with a naming scheme like 001.jpg, 002.jpg will be fine. If you're not sure, start with some more leading zeros - start with 000001.jpg, which will alow you to add nearly a million files to one album (999,999 to be exact). That should be more than enough, as it doesn't make sense to store a million files in one album.
When coppermine organizes my photos it seems to totally disregard the photo number. For example:
100001_1
100001_2
100001_3
100001_4
100001_5
Gets ordered as
100001_1
100001_4
100001_3
100001_5
100001_2
Why does Coppermine ignore the photo number? Is there hidden meta data in photos that it reads and uses to order them?
It doesn't: you must have applied a custom sorting pattern that get's stored in a cookie and overrides the standard sort. Clear your cookies, then try again. If this doesn't work for you, then post a deep link to an example where you claim that this is happening.