I have doubled the quota on the account, however you will want to tweak your WordPress settings - every image uploaded looks to be generating an additional 4 thumbnails. Generally speaking, you should only need one per upload, and this is causing each image on your account to generate about 60-65% additional usage because of the thumbnail generation. Reducing this extra usage would be recommended as you may run into problems with the Image Gallery rule in our Terms of Service if it's not mitigated.