I'm not 100% convinced on the Vitro vs. MK thing. That always used to be argued about. In any case, the only marbles I ever recall being called Lucky 7 had that kind of coverage. Not thin stripes. Maybe they weren't actually Marble King, but they did have essentially full coverage, whoever made them.
Edna, at the top left side of your reply window, there should be an icon for "BBCode Mode". If you click on that, so that all those other buttons become dim, then maybe that will stop the problem you're having with the random font changes. Maybe you're accidentially clicking on the other buttons. Dimming them will inactivate them.