Copy/Paste of Chords not working correctly

I'm using MuseScore version 0.9.5, revision 2012.

I am having problems with copy/paste of chord names. An example is I'm typing in a lead sheet. The first 6 bars are just the first two bars repeated 3 times. So I thought I would enter the first two and copy the rest. What happens is that the notes and values copy correctly but the chord changes aren't. The changes are | Cm7 | Ab7 G7 | . What is copied is |Dbbm7 | A7 Ebb7|.
The first chord copied is technically correct, although not acceptable. The other two I have no idea what is happening. I've tried with and without the concert pitch enabled. My key signature is correct and I haven't made any transpositions to the piece. I started a new document to enter the piece. I chose Vocal the first time as the instrument and the second time I tried with the same results was piano (treble clef only) as the instrument.

Have I got something set incorrectly or is this a bug?

Thanks