After adding odd pages, the page header would confused ?

[Billy190417]

    Hello everyone!  Hello world! I can speek a little english.Now i have a question, this is the first question.  i need help.thanks!! In a document, when i add one page , the headpage would be confused。 How can i solve this problem and why.

right:

wrong:

[tpk1982]

Reapply the master page again on the two spread in the middle you showed...

[Billy190417]

Thank you ! But when i add one page or reduce one page the problem happen again. How solve this  basically？ Let it normal。Thangk you again.

[Jongware]

If you are doing this with a script, please show it. If not, you may want to ask in the regular forum, as this one is for scripting only.

[Billy190417]

I hope someone who can help me write this script !!