Word Set into a Two-Column Format Reverts Number Sequencing

I am using the numbering page doing my Word documents, and I have set it into a two-column format. At first, it goes very well, but it suddenly reverts the sequence.
I have checked my settings, and the optimal resolution was set to the required value but no other option in changing it.
Please help me how to use this normally and continuously using my settings.
I do not know what to do anymore.
Thank you.
