I have a bit over a million in till, and, visiting the till I've seen this:

Unlocked Shop Till Saver!

Have sP in one shop till at one time!

I presume it should be "Have xxx sP in one shop...", with the number missing at the moment?

All achievements that have tiers are like that, they don't tell you which tier you unlocked.

In this case, on the achievements page the achievement says:

When you unlock an achievement, it says the same achievement name and description from the achievements page without the specific tier. But you can always use the search function on the achievements page to find the achievement and see which tier you've just unlocked.

I thought it was going to be like Unlocked Vending Maniac!!

Vend 100 items from a Vending Machine!

Otherwise the phrase sounds... strange. Oh, well.

As for the achievements, they don't make sense. How can I have 1.3 million in till and only be half-way to Have a shop that has made a total of more than 1,000,000sP! 600,305 / 1,000,000 ?

Is it "profit"-counting? Then how is the buying price calculated? The amount of logging required is mind-boggling! :/

Some achievements require you to visit specific pages before they update. You may need to visit here, here, or here before it activates. I can't be 100% sure because the lifetime sP made by shops is currently disabled while staff is working on it and the achievement may not even update at all until it returns.