This is a known issue.
For More Information see: Specify Field dialog jumps to top (not selected field) 13.0v4 and Yosemite 10.10.1
This is one of many acknowledged bugs that can be found in the Known Bug List thread here in the Report an Issue section of the forum.
It can also be downloaded as a database file from: https://www.dropbox.com/s/jt09b82i0xijbu3/FMP%20Bugs.zip
Thank you for your post.
As PhilModJunk reported (Thank you), this issue is known by our Development and Testing departments. I have attached your post to the original report. When more information becomes available, I will let you know.