Same stamp image but different denomination?

The upcoming issue from Pos Malaysia has one very interesting feature.

2 children’s drawing (4 stamps due to both stamps being setenent) on the Sheet of 20 have the 50 sen denomination.

The same 2 drawing (4 stamp) is also issued in the booklet format but are denominated in 30 sen.

Looks like there are going to be a lot of confused people in the not too distant future. 🙂