Is there any problem with these TSL201R IC's?
I think these are not TSL201 ICs. Looking at the datasheet, the optical response is centred around 700 nm, it looks unlikely that case is transparent at that frequency. Additionally, the pin spacing looks odd - the spacing is not equal, which it would be for a DIP8 part. In the datasheet page 9, you can see it looks like the "real" picture you included. Try hooking them up functionally, but I think these are not the ICs you are looking for. Whether this is malicious, or an honest error is for you to work out with the seller (good luck!).