In some cases, you may have decided to have multi-segmented file names or component names using a numbering scheme. It is possible, when viewing these items in the Document Components window or in the repository tree, that when the numbers reach a certain level, the items no longer appear in the sequential order.
For example:
1.1.11.1.101.1.21.1.9
If you rename the files to keep a 3+ digit number, that can resolve the issue. For example:
1.1.0011.1.0021.1.0091.1.010