From version NSP 10.7.6 default full text search data algorithm is LIFO. Before default was FIFO.
•LIFO (stack) – last in first out, latest added/updated item will be indexed first.
•FIFO (queue) – first in first out.
Search data algorithm can be set in database:
exec app.spSetGlobalSetting 'EnableFullTextSearchLIFO','true'
•true – activate LIFO
•false – deactivate LIFO, activate FIFO