Hello,
Its might be some sort of custom ( Burma related ?).
Nah you are not doing anything disrespectful. It’s possible the young woman simply taking literally from what she heard, without much investigation.
Pa-uk tradition rarely explain much of this aspect of Vinaya during retreat.
( Maybe due to language constraints- from Burmese ).
It this possible she is referring to certain part of 75 Sekkhiya Vattha
from Vinaya .
https://www.accesstoinsight.org/tipitaka/vin/sv/bhikkhu-pati.html#sk-part1
https://suttacentral.net/pli-tv-bu-pm/en/brahmali?lang=en&layout=linebyline&reference=none¬es=asterisk&highlight=false&script=latin
26. I will not sit clasping the knees in inhabited areas: a training to be observed.
- Pallatthika
‘I will not clasp my knees while sitting in inhabited areas,’ this is how you should train.
Na pallatthikāya antaraghare nisīdissāmīti sikkhā karaṇīyā.
65. I will not teach Dhamma to a person who sits clasping his knees and who is not ill: a training to be observed.
- Pallatthika
‘I will not give a teaching to anyone who is seated clasping their knees and who is not sick,’ this is how you should train.
Na pallatthikāya nisinnassa agilānassa dhammaṁ desessāmīti sikkhā karaṇīyā.
Those are part of training for Bhante, or novice Samanera-samaneri only.
From what i understand its not applicable to layperson–
( you can double checked again with Bhante ,Bhikkhu Sangha).
Respectful proper posture is essential when you are in a community.
As lay person , we will be respectful and mindful during retreat
Side Notes
(its good to do the following as part of our mindfulness practice)
Avoid pointing your sole feet toward Tiratana/Altar Buddha, Tipitaka,(eq: Tipitaka collections) , or towards Bhante,Bhikkhu Sangha. ( sole feet is consider improper, disrespectful).
Avoid placing Dhamma haphazardly ( eg : Chanting book,paritta book, sutta etc) placing it at higher place or somewhere respectful.
Not wearing cap, (remove the cap during the Dhamma-talk) not speaking loudly, laughing during the Dhamma-Talk.
Be Mindful in Noble Silence. Applied sati-sampajanna while listening to Dhamma.
Out of respect to Sangha, we will sit at lower meditation cushion, not higher than Sangha. Remove cushion during Namaskara.
Switch off the Handphone during Dhamma-Talk.
Hope this can be helpful.
Mettacittena
Qzl