Posted about this a while ago in a different category but didn't get a response, so I'm wondering if this is a better place to post.
I'm trying to use the drop-down box to remove all but one of an item from my shop for the Recycle Beast. I'm not able to even use the drop down box since it stays at 0 and the numbers don't appear when clicked.
[egg=Haswari] 👻 [tp=Haswari] Holiday, Lifelikes and others for trade <3 Wishlist
Do you have more than 20 of the item in your shop? After 20 the dropdown turns to a text box and you must type in the number you'd like to remove.
Here is a screenshot from my shop. For the I have to select quantity from dropdown; for the I have to type in the number. In both cases I then need to click the Update Items at the bottom of the page.

No, when it's less than 20 (even 2 or 3 items) the drop-down button is there but is unclickable.
[egg=Haswari] 👻 [tp=Haswari] Holiday, Lifelikes and others for trade <3 Wishlist
Is it all of your shops?
Do you have any custom CSS or browser plugins active?
It's working perfectly fine for me.
All my shops and galleries. No browser plugins and I haven't changed my custom CSS stuff in years. My custom CSS codes don't involve my shops or galleries either, and they're pretty short/basic codes for things like pet options, WL item border color, etc.
I'm using Chrome on an Amazon Fire tablet if it makes a difference, but that's nothing new either. :P
[egg=Haswari] 👻 [tp=Haswari] Holiday, Lifelikes and others for trade <3 Wishlist