If you in fact mashed at 158F you certainly converted, but you converted to a very high percentage of unfermentable sugar...i.e. dextrins...which won't necessarily taste sweet, but they won't ferment no matter how much yeast you add.
You have a nice high body, low alcohol beer.
Something is always fermenting
...."It's Bahl Hornin'"Primary: Brite Tank/Lagering:
Cider, German Pils, Belgian Tripel, Bedeviled (Bel. Golden Strong), AHA Summer Ale, Sonoma County Organic Cider, Maibock Bock, Ommegang Abbey Ale CloneBottled:
Contentment (Trappist), Derangement (Belgian Dark Strong), Kranky (Kolsch v1.1), Wise One (Wit)On Deck: My Site: www.restlesscellars.com