Missing Ordinances in the FamilySearch Family Tree?

Unintentional duplication of temple ordinances has been a concern since the 1800s. This entire issue is discussed in detail in the following book:

Allen, James B, Jessie L Embry, and Kahlile B Mehr. Hearts Turned to the Fathers: A History of the Genealogical Society of Utah, 1894-1994. Provo, Utah: BYU Studies, Brigham Young University, 1995.

The issue is still currently under discussion. From time to time in the FamilySearch.org Family Tree, ordinances appear to be missing when the users are aware that the ordinances were performed, sometimes by the users themselves. Part of the explanation for these omissions is contained in a Help Center article entitled, "Ordinances are missing in Family Tree (Not displaying) Member Issues Addressed." In some cases, those not registered with an LDS account may not be able to see this or some of the other articles in the Help Center that pertain specifically to members of The Church of Jesus Christ of Latter-day Saints and the Temples.

The article linked above contains specific, detailed instructions concerning missing ordinance data. From the article cited, it is apparent that the Church is concerned that any issues such as missing ordinance information be resolved and the article provides very detailed information about the procedures for correcting any omissions.