ok, i'm not getting the bolded part. this graph shows 37 MB worth of unconf tx's, no?:
No clue, no node I have access to is seeing that much-- they may have turned off the minfee rules (not unreasonable for a metrics thing)...
Even given that, again, 37MB doesn't explain your swap.
but turning off minfee rules would only be used to include 0 fee tx's.
look at how much BTC value is included in that 37MB.