That's weird Lynnie! Yours came with stickers that people can do whatever with, and mine came with heart-shaped stickers to sticker them shut with so the fold doesn't make them pop open. Also, my box has a smaller Bloo in sunglasses doing the Fonzie "thumbs up" pose. The Valentines are the same as far as I can see though, except that yours have the little slit.
Same sticker design too, just different shape and purpose.
The only reason I can think that they didn't put Frankie on them is because while she's a great character, she's not so much one that small children, their target audience, gravitate to as much as say Bloo or Eduardo. I agree that they could have put her on one WITH Bloo or Eduardo, but eh, some mass marketing ideas aren't always the best ones.
