a little OPK help please.

Hello! I usually don’t have any issues reading OPKs. But I switched brands this month and I’m just struggling. 
Here is today’s at exactly 10 minutes which is what the instructions say. I wouldn’t call it positive. But it seems close. 
After another 30 minutes. 
It seems very different. Other ovulation tests I’ve used haven’t changed so much... so I’m a little perplexed. These are New Bornty brand from amazon btw. 
Is the issue just that I’m looking at them late?