Variants not changing price when selected, also not able to add quatities

Topic summary

A Shopify store is experiencing critical issues with product variant functionality for event t-shirts:

Primary Problems:

  • Variant prices don’t update when customers select different shirt sizes (larger sizes should show higher prices)
  • Quantity selector is locked at one item—customers cannot increase quantities for purchase
  • When adding different sizes to cart, all items default to a single size regardless of selection

Product Context:

  • Selling multiple t-shirt sizes with size-based pricing tiers
  • Issue affects the ability to process orders for an upcoming event

Technical Details:

  • Tagged with CSS, HTML, JavaScript, and optimization—suggesting potential front-end code conflicts
  • Product URL provided for reference

The store owner needs urgent assistance resolving these variant selection and cart functionality bugs to enable proper multi-item, multi-size purchases.

Summarized with AI on November 9. AI used: claude-sonnet-4-5-20250929.

https://www.simplestories.com/products/crafty-babe-2024-retreat-t-shirt-soft-pink-1

https://www.simplestories.com/collections/retreat-merchandise