You should be able to auto tune anyway. Should not need code rate. Just use predefined transponder and select the channel/frequency. That comes from terrestrial.xml and doesn't contain code rate at all. The tuner should work it out.
If it could do that then I would have no problem to tune to a mux with those code rates. But it wont. It could also be a completly diffrent bug that is involved but the missing code rates are the only cause I have found so far.
The Dvb-T2 mux with a supported code rate tunes just fine.