URGENT : Problem with firmwares for W810

Hi , I notice some problems in download section - W810 R4EA031_RED50.
All MAIN are R4EA031_RED50 , but all FS are W810_R4ED001_FS .
So I hope this is just some writing error .

Regards and Thanks

It isn't a typo i think, but they(R4EA031 MAIN and R4ED001 FS) will work together just fine, don't worry ;)