POST PLUS - no luck

I bought at Rural King couple wks ago or you could order it from Gemplers that I've used.

dumb question but could it be labeled as anything else? liquid (20-0-0) or something like that?
The reason I ask, is I only found one type of AMS at Rural They are sold out all but one store in 90% of my state!

This is the type of CLETH I am seeing at my TSC - will this work? Rural king has a gallon of Cleth as well for around 49 bucks. I am planning for next year.

Rural king

any difference in these?

Thank you!
The TSC stuff works out to be a pretty expensive price per amount needed. Get the rural king for a much better value.