Purchase Suggestions

As we approach the end of the year, I notice that materials will purchase contracts are not showing suggestions beyond December. There are forecasted orders for the finished parts going all the way out to April, but no purchase suggestions. Is this what is happening or is something else able to stop the suggestions at the end of the year? I am also wondering if I should have entered these as contracts or just put them in as regular PO's. Any thoughts on this?

I am really a programmer and not a purchaser. I have been filling in for a year in this role and just don't have a good background in this.

Thanks for your thoughts,
Tim Dines