Field not being copied in API call with Save

I have a button that is as follows:

URLRoot() & "db/" & [_DBID_ACTIVITY_LOG_DAVE] & "?a=API_GenAddRecordForm&_fid_11=" & "Tasked to Team Member:        " & URLEncode ([Description]) 

& "&_fid_50=" &URLEncode([Company Name (ref)]) 

& "&_fid_47=" &URLEncode([Worker or Project Name (ref)]) 

& "&_fid_223=" &URLEncode([Project Name (ref)]) 

& "&_fid_97=" &URLEncode([User #]) 

& "&_fid_31=" &URLEncode([Now]) 

& "&_fid_22=" & URLEncode("Case Analysis & Strategy") 

& "&_fid_12=" & URLEncode([Time Logged For Action]) 

It works perfectly and copies everything over and fills alright the right fields in. It is only available while viewing a record. Although I have another iteration which is 

"<a  class='Vibrant Snowy' href='javascript:LinkAway(\""&[Add Activity]&"\");'>Add Activity</a>"

It is available while editing a record. Except its does not seem to want to copy over 

& "&_fid_12=" & URLEncode([Time Logged For Action]) 

I do have "Save parent record automatically when a child record is created" checked off.