Marketing Channel Overview Report - First Touch/Last Touch

I have the Marketing Channel Overview Report set up with rules in the screenshot below, with Facebook.com and Instagram.com being under the "Social Networks - Others". However, I am seeing a "l.instagram.com" conversion (under First Touch and Last Touch) and "m.facebook.com" conversion (under First Touch) both under "Referring Domains" instead of "Social Network - Others".

In addition, the one Referring Domains - "m.facebook.com" First Touch conversion also appears under the Social Networks - Others Last Touch conversion (meaning, the single Facebook conversion was recorded under Referring Domains for First Touch, but then was recorded under Social Networks - Others for Last Touch).   I am very confused as to why these conversions are recorded separately under different channels. Does anyone know why this is happening, or see similar issues?  Thank you!