InDesign ePub not opening on first page

I'm using InDesign to publish an eBook, so I'm trying to create a reflowable ePub. However, it keeps opening on page 233 (317 pages total). I'd like the ePub to open on page 1. 

I noticed someone posted about this in 2019, but I tried the recommended step and it didn't work. (Also, when I save any other way for navigation, the chapters don't start on new pages.)

(https://community.adobe.com/t5/indesign/epub-opening-page/td-p/10461889?page=1) 

I've tried saving the file under a different name and deleting it and re-saving it.

All of pages I want in the ePub are saved as articles and in the right order. I am saving it as a Reflowable ePub.

Settings:

GENERAL

Version EPUB 3.0

Navigation TOC Multi Level (TOC Style)

TOC Style [Default]

Content order Same as Articles Panel

Split Document checked: Single Paragraph Style (Anthology: Headings: TOC Heading)

TEXT

Footnotes placement Inside a Pop-up

Lists:

Bullets Map to Unordered Lists

Numbers Map to Ordered Lists

OBJECT

Preserve Appearance from Layout checked

CSS Size Relative to Text Flow

Layout Align Centre

Ignore Object Export Settings NOT checked

CONVERSION SETTINGS

Format Automatic

Resolution 300 PPI

JPEG Options:

Format Method Progressive

Image Quality Maximum

GIF Options:

Palette Adaptive (no dither)

HTML & CSS

Include classes in HTML checked

Generate CSS checked

Preserve Local Overrides checked

Include Embeddable Fonts checked

JAVASCRIPT

Blank

Metadata

Title, Creator and Publisher filled in and Identified left as it was.

Does anyone know how to fix this? Would really appreciate your help.