All Galleries Sequence in numerical order.
Do this in LightRoom or similar program and Our Gallery builder will sequence your Gallery correctly!
When importing or renaming your files, be sure your Sequence# Starts with (00001) you can change this in the File Name Template Editor in LightRoom.
Your file numbers must have at least four 0's in front of the 1
Here is an example... i have uploaded them 7,4,1,3
click the link below
and as you can see in the gallery they are displaying in order sequence 1,3,4,7