Bonnie should've gotten a Flipdeck first, THEN her sister Yalanda. But instead, Yalanda got it first, and we'd will have to wait for her Bonnie to get one eventually. It makes no sense!
Yalanda got her Flipdeck on April 26 of this year.
Also why do you think it's unfair and doesn't make sense that she got her Flipdeck before Bonnie? I don't recall any differences in characteristics between the two, except for the fact that Bonnie is older than Yalanda.