In the November Menaion by St. John of Kronstadt Press, for the Kursk Icon feast on Nov. 27th, there is only one canon which has the Irmos: "I will open my mouth...". If there was to be another canon preceding this, you would see it mentioned in the rubrics in this service, but the rubrics in the service say only: "The Canon to the Theotokos, the acrostic whereof is: "I dare to offer thee praise, O Theotokos", in Tone 4"
You will find that any service to the Theotokos has more in common with rubrics for a Great Feast of the Theotokos on a weekday, rather than the rules for a saint.
For comparison, in the SJKP Menaion, the Polyeleos service to Apostle Philip (Nov 14) when it is served on a weekday, the rubrics given with the canon specify:
Canon to the Theotokos (the Paraclysis), with 6 troparia, including the Irmos, and that of the apostle, with 8 troparia [... etc.] This is the way a saint's service (other than the Theotokos) is done on a weekday, which corresponds with the general rules for a Polyeleos rank service in "The Order of Divine Services".