Fixing the screenshots: the transfer of your rack data into a pure graphic file can be a little dicey on MG. What's necessary is to pull up a screenshot of the rack in question, then refresh it. For some reason, MG likes to "lock" on certain build stages, and by hitting reload you can "thwack" it into putting the proper result in place. Once refreshed (and this really should be a "must do" every time you're prepping a screenshot), then everything displays as it should.
As for the speed, it's probably yet more Chinese and/or Indonesian spammers trying to get into MG. There was a massive problem with that until the REcaptcha was implemented, but my bet is that MG's still on a list of "sites you can use as a text-based toilet for your bullshit" in the spam community, ergo sometimes you might see something like an accidental DDOS attack going on occasionally. Just wait...it'll ease up.