Cannot set 'Put' event on S3 lambda function

I'll try to encode video files using lambda function and S3.

I set s3, elastic encoding and lambda function to encode files (based on this documentation:http://ift.tt/1FnNJr1), on uploading files on specific s3 bucket. Tests on lambda console and file encoding works fine, but I cannot set 'Put' event on s3.

I mean, every time I 'configure event source' on lambda, 'Put' event on s3 automatically reset to 'Objectcreated(All)'. I can't figure out why this happens.

Encoding works fine with 'Objectcreated(All)', but the function also runs when I don't want to.

Please teach me why this happens.