tenth-century manuscript (Ms. 1739)

This MS was most probably copied from of a Fourth century MS. 

1 John 4:2-3

By this you know the Spirit of God. Every spirit that confesses that

Jesus Christ has come in the flesh is from God; and every spirit that does

not confess Jesus is not from God. This is the spirit of the anti-Christ.

That does not confess OR “that looses Jesus.”

"that Looses Jesus" is found only in this MS and hence can't be accepted as as original by Bart Ehrman. 

For when [God] subjects to him all things, he leaves nothing that is not subjected to him. But we do not yet see all things subjected to him. But we do see Jesus, who, having been made for a little while lower than the angels, was crowned with glory and honor on account of his suffering of death, so that [ by the grace of God/apart from God] he might taste death for everyone. (Heb. 2:8–9 )

"Apart from God" is only found in this MS. 

Note: Both the variants are only found in this manuscript plus both the variant reading was known to early church fathers. But Bart comes to two different conclusions for these two variants.

Bart says 1 John 4:2-3 "That Looses Jesus" can't be the original reading.

However Bart stresses that "Apart from God" in Hebrew 2:8-9 is the correct reading.

We can clearly see why he came to two different conclusions because if Jesus died "apart from God" then Bart has one more reason to deny his faith.

His conclusions are determined by his prior convictions.