Did anyone besides me happen to notice that this is labeled "V1: No. 13" in the indicia? That makes ZERO sense.
It maaay make some sense, if you stretch a little into the world of fly-by-night business. As I think we kicked around once, there doesn't seem to be a publishing definition of a "volume," so some publishers use it for a year's worth, and other use it for a title.
If it's the latter, you'd rightly say that nobody would logically name something v1 unless they knew a v2 was coming. Except...what if the original business plan (as has been typical with websites, which has a similar profile in some ways--the medium is cheap, and a lot of creators cheap out the content) was to get a "name" worth being acquired? Then the buyer would run Funny Picture Stories v2, while they'd jump to a new trademark and wait for the next buyer.
They might then either not make enough to sell or made too much to bother selling, and retroactively changed their definition of "volume" before anybody wondered why there were thirteen issues in a one. Except the cover, I mean.
I'm not claiming any knowledge of the situation, by any means, but it seems like a reasonable hypothesis to work from, at least.