307 clutch slip/jerkyness

[cluelesscarnut]

I bought a 307Hdi 136 recently and it's been acting a bit funny.everything seemed ok on the test drive so I bought the car and collected it a few days later.on the way home we had stop start traffic so driving at low revs and then we got on the motorway which was average 60mph with occasional blast to 75/80 then back again.when in 5th and 6th just as full torque is hit(2200rpm ish) it's slips a few hundred rpm then settles.it doesn't do this when cold or on light throttle or under 2000rpm even if floored in 6th so I thought slight clutch slip.a day later and still does it but 4th gear aswell now.I phoned the garage and told them the clutch is slipping and I'm taking it back tomorrow but today on the way home it didn't slip once.confused I went for a drive this eve and found out it only does this after stop start low revs with some acceleration so does seem to be clutch heating then slipping But it has another problem that makes me think dmf.it's really jerky on low throttle openings below about 1750rpm,feels like slight kangarooing and it's hard to change gear smoothly unless it has revs.it's fine above 2500rpm,no slippage or anything and it does standing start acceleration.so what do we think?is the low rev light throttle problem connected as it wasn't like that before the clutch slip?is this a symptom of dmf problems?want to have all the info before I take it back.

Cheers in advance