I'm thinking about submitting the following as a suggestion.
The Valentines Bling achievemtents for 5 and 20, should be:
Receive a Valentines Bling from 5 different people
Receive a Valentines Bling from 20 different people
Give a Valentines Bling to 5 different people
Give a Valentines Bling to 20 different people
Leave the 50 and 100 as they are, cumulative.