Got this at the top right hand corner when trying to like somebody's HA. Am I only allowed to like one HA per day?

The second issue is the heart failing to turn pink when I liked it, so I kept clicking it a few times and saw this message.

you can only like the same persons HA once a day, even if they have changed. I believe you are able to "like" up to 20 people a day. if you are clicking the heart of someone who has posted more than once on a page the first post/ha will turn the heart pink but the one you click doesn't change. Weird little quirk.

That was another person from the first I liked....ah okay. Weird, it should turn pink, didn't know it only did that ONCE.