All sanctuary procedures were spoken of as "morning-evening". The sole
exception, which you pointed out, was the lighting of the lampstands, which
were lit on a sunset to sunrise ("evening-morning") basis. Doing so would
ensure that the oil would last throughout the dark hours. However, the
continual burnt offering is never spoken of as "evening-morning", but as
"morning-evening" (see Exodus 29:39; Leviticus 6:12-13; Num 28:4; 2 Kgs
16:15; 1 Chron 16:40; 23:30; 2 Chron 2:4; 13:11; 31:3; Ezra 3:3).
As to the Septuagint and the Theodotion translations, of course the word
"days" was supplied. My point was that the translators evidently interpreted
the phrase as meaning "days", not "sacrifices".