The Great Sunflower Project

I have a question about the method of tagging photos.

2. . For us to relate those photos to your data, we will need you to add some tags – your sunflower login name and an id to relate it back to the sample. We’d like the id to be the date written as one word (JUL1509) and then a period followed by the bee number (e.g. 1) So, for the third bee on July 25th, you would write JUL2509.1.

I would expect the third bee to be tagged as follows...JUL2509.3. not JUL2509.1. Why is it dot one and not dot three?

Thanks,
Angie