Problem with run-in heads

[Roger Jones]

I'm glad to be back after a long absence from Framers, and I am still on FM 
7.0p579.

I have a problem with run-in headings in a double-column format. All paras 
are set to 10pt fixed and there is no line feathering, but the run-in heads 
are misaligning the baselines across columns. A page full of text with no 
headings has perfect alignment; add a run-in heading and the right-hand 
column goes out of alignment from that point onwards. Setting columns to 
balance makes no difference.

I need the run-ins because I want two paras on the same line, with 
automatic running heads picking up on one of them and not the other.

Any clues, anyone?

All the best

Roger Jones