Picture galleries not sized correctly

Hi,

I reconnected Jetpack last night because my email notifications did not go out as expected and was advised to do so. Today I’m noticing that my picture galleries are no longer sizing correctly. When I created a gallery in the past, I could pick the size (Large) and the pictures would automatically be sized to fit correctly so that each picture in the gallery would be lined up horizontally. Now it’s asking me to pick the number of columns and it’s leaving the pictures as they were so that they are no longer aligned. It looks terrible. PLEASE HELP!

You can see an example on this post:
https://madhattersnyc.com/2016/11/29/kyoto-travel-guide-see-eat-part-one/