Subscription confusion

I paid $45 sale price in Dec 2014 for this year. I just got an email message saying that I have secured a low rate.

In your message you seem to be indicating that I will continue to pay $45 every year I renew. Is that true?

Here is your message:  There's great news though- we're keeping all existing customers on the same plan they're on. As a Premium customer you can remain on this plan as long as you like, at the exact same rate! 

Yes that is correct, you can keep that price on that plan for the time you wish. If you decide to upgrade to a better plan, then you can also lock up the prices. If you do it after August 15th, the new pricing structure will be applied.