People purchasing items on mobile devices could definitely be the cause of this problem. When using the Etsy app or the mobile web, you can only see the first two words or so before clicking on an item. (For instance, if the title is “Victorian-style Dining Table for Dollhouses” they will see something that looks like “Victorian-style Di...”)
If you go to Shop Manager » Stats » Customers and then scroll down, you can see a pie chart that shows the different devices people are using to find your shop.
If you have a high percentage of mobile-device users, you may want to try making the word “miniature” the first word of your title. (For example, try “Miniature Victorian-style Dining Table” instead of “Victorian-style Dining Table for Dollhouses” so that mobile users see “Miniature Victoria...” and know that it’s not life-sized right away.)
Honestly, though, I use my phone to both manage my shop and buy things on Etsy, and if you actually read the item title and description, 99% of the time, you can easily tell something so obvious as the relative size of the item.
If this is a very consistent problem, you can also try putting “PLEASE READ ENTIRE DESCRIPTION” at the beginning of your item details section.