I’m not great at explaining things, but what exactly are you doing when making/saving it?
I make my gifs using Photoshop CS5. If that’s what you’re using, make sure you actually save as a gif and not a png, jpg, or anything else, otherwise it’ll just be a regular picture. When you’re ready to save, go to File and click Save for Web & Devices, there’s a drop down menu and you should click GIF to properly save it.
Also, for posting on tumblr, make sure it’s the correct file size or it won’t show up the way you want it to. The size limit for gifs 500px wide is 1MB, while gifs that are 245px and 160px wide are 2MB. (However, tumblr seems to hate me lately and won’t upload my gifs even though I know they’re within the size limit.)
I hope this was helpful! :)
This is so sweet. Thank you so much!
I did the steps in this post because not only does it let you have multiple gifs, they can also be over 1mb.