Hey drutter, several people complained about this, it kind of depends of where people browse steemit.
As a first rough explanation (not solution), the text is stored on the blockchain, the images are hosted on IPFS (steemimages?), the link is of dynamic from what i understand, because i was able to edit the size in the adress bar (not on yours tough), so the file is actually uploaded as original but shown differently according to the format on adress or where it is viewed.
At least i believe it's like this, hopefully someone will update us if there was some changes.
Thanks for complaining ;)