Premiere Elements 2022 Add Media Issue

When using Add Media to load groups of sequenced numbered photos the sequence is scrambled in Project Assets. I have tried importing groups of photos directly to the time line.  The photos do show on the time line, but some of them do not show in Project Assets.  I have approxamitly 300 photos for use in making this movie and I have more movies of similar structure to make.  The sequence of the photos in the movies is critical.  Having to import each photo individually is not practical.